Here are the details of my particular brush situation: I own mostly synthetic EcoTools brushes, with a couple of the ELF Studio brushes (which I think may also be synthetic) - nothing super high-end, the Sephora eyeliner brushes I have are the most expensive of the lot. I don't wear foundation on a daily basis, nor do I use makeup sponges, so most of the makeup residue on my tools is powder eye products, or cream eyeshadow or blush. The majority of my makeup is drugstore brands, and the occasional MAC product.
I also don't tend to use makeup brushes every day - I have a backup or two of the ones I use the most, like my eyeshadow blending and eyeliner brushes, so while I am washing all of them every two weeks that means I am washing each brush after 2-3 uses max.
I picked up this cleanser when my brush collection got large enough that I felt like it was worth taking better care of. It does smell very strongly of lavender, and your brushes will smell like it no matter how well you rinse them, so be aware of that if you're sensitive to scents. It even sticks around on my hands for a while afterward, because I use my hands to work it into the fibers. It takes the makeup residue off all of my brushes completely, and does not leave any residue behind.
My method with the cleanser is to take 2-3 of my brushes and position the heads in the palm of my hand over the sink, and then spray them with the cleanser. (The instructions say to wet the brushes first, but like another reviewer I feel like the cleanser is more effective if I start with dry brushes.) This helps prevent waste, because the excess cleanser stays in my hand, and then I swirl the brushes around in it to help work it into the bristles. I keep them angled down during this whole process to make sure I'm not getting any in the ferrules (the metal part that secures the brush to the handle) that will loosen the glue or cause rot. Then I wet my hand and swirl the brushes around some more, to help work it into a lather. At this point I can either set them aside for a minute to let the cleanser break down more stubborn products, or I rinse them out under the faucet until the water runs clear.
Overall, I'm very pleased with it. It's reasonably priced for how much you get - I've been using it regularly for about 4-5 months, and have used less than 1/5th of the bottle. My brushes have stayed in very good condition, and are nice and soft. Previously I had been using shampoo or a little eye makeup remover to wash my brushes, and while those were probably just as effective, they were not as convenient for me. I find myself washing my brushes more often because all I need is my hands and a sink. (And some room to set them out to dry, but that is a whole other story.)
If you own a lot of high end or natural fiber brushes, it may be worth investing in a higher end brush cleanser or just sticking with shampoo to keep it economical - I have heard that natural fiber brushes can be harder to clean (simply because natural fibers have more texture that will hold onto product, which is what makes them ideal for powder products). If you are a light brush user with more low-end or synthetic brushes, you will probably find this worth the money. And know that it's strongly scented!
Ugh. I disliked this so much that I gave it away after forcing myself to use 15% of it.
Biggest issue was the smell. It smells EXACTLY like the dog shampoo we used to use, so my aromatic memory was wet dog, not exactly what I want my brushes to smell like. I guess it's lavender, I don't care for lavender anything really, and I didn't realize that the brush cleanser had lavender in it. Lavender applied topically makes me red, itchy, and inflamed, but luckily whatever was remaining on the brushes didn't do anything noticable to my skin. This issue is totally personal (but still valid).
Second issue was the lack of its ability to clean. So I had used Johnson baby shampoo (and I think the equate version once, but I preferred name brand) for several years (at least 3). I ran out and didn't feel like having another bottle in my bathroom, so I decided to use a shampoo that I didn't like on my hair (Suave almond something). When I used up the Suave shampoo, I started using my philosophy purity cleanser that I was also trying to use up (basically because it was super old, I didn't have anything against it). Then I saw the SK brush cleanser and decided to try it at Target when there was a mobile coupon for $3 off SK product. All of my previous cleansers worked WAY better than the SK one. Now, maybe I prefer thick products, but I felt like I would use 5+ squirts on every brush and it still wouldn't come clean. My routine was to wet the brush fairly thoroughly, try to spray the brush close enough that the liquid would be on the hairs (see Issue #3), and rub the brush like mad in my palm. This was just not melting my makeup off, I particularly had issues with glitter shadow on a RT brush, lipstick on a RT brush, liquid foundation on Sedona Lace midnight lace angled and round buffing brush. I even went so far as to spray directly into the head of the brush of the Sedona Lace brushes, because there was foundation residue in the core of the bristles, but not on the outer ones. I tried soaking those brushes after spraying solution directly into that in about an inch of solution + water, and squishing around the brush to try to distribute the cleanser. No dice. I tried my philosophy purity after that and the majority (still not all) of the liquid foundation rinsed down the drain.
Third and final issue, the spray. I think that a spray is convenient, as the tops on my baby shampoo and regular shampoo always got messy, but when utility is given up for convenience, no bueno. The spray was an ok spray if I was using it for a hair product, but it sprayed far too fine and wide for a brush. Think about it, the biggest brush most people use is maybe 2 1/2 inches wide, and the spray was at least 6 inches. That just doesn't make sense to me. And even when I compensated for that by spraying directly into the brush head (i.e. toward the barrel potentially creating moisture that can rot the wood) it didn't work.
I'm happy that this works for other people, and I bought it based on the good reviews, but this was no good for me, it left my bathroom and went to my friend's house to live.
I used to just use my face wash (cetaphil) to clean my brushes and thought that was doing a good job...I bought this on a whim when I was at target and apparently the face wash wasn't doing as good of a job as I thought. It cleans the brushes REALLY well. And my makeup sponge too (which like NOTHING could clean) it got rid of ALL the makeup. 100% recommend. I will buy this forever XD
really good!!! i use it once a week and it does a great job cleaning brushes. recommended for high quality brushes that u want to last long :-)
I picked this up a month ago at target and I am so glad I did. I was cleaning my brushes with eye makeup remover, which worked well, but you have to use a lot to clean the brushes well. You would have to pour some out into a cup and swirl then brushes in it and change it out after 2-3 brushes. It was costly but effective. This was $10 I think and so worth it. I have used it about every 3 days and haven't even used 1/8 of the bottle. It's a spray and it smells like fresh lavender. Not the synthetic perfumey lavender used in a lot of products. The instructions say to wet your brushes first then spray them but I find if I spray it on them dry, it really grabs the makeup better. The true test was my liquid/cream foundation brush. That stuff grabs to my brushes like a parasite. I wish they would grab to my skin like that. It takes the foundation off the brushes with no problems at all. Just spray like 4 sprays into the center of the brush and squeeze with your fingers. Really work it in and then rinse. It's fantastic. I was reluctant to purchase this since $10 for a bottle of spray soap seemed ridiculous and I thought I would have to use a lot to get the job done but that is not the case. This will probably last me about 6 months. Well worth it.