This is one of my biggest HG's. Although I generally have pretty oily, resistant skin (I can use fairly strong acids and peels w/o issue), it's become dreadfully sensitive to all cleansers. Basically, any gel, surfactant-type cleanser, no matter how gentle, just doesn't really agree with my face.
I used Aquanil for a long time a few years back, but since I am very acne-prone, I stopped using it in fears it was contributing to my cloggy skin. I've now come to accept that my skin is just really clog-prone, it will never be perfect... after frustration with more gel cleansers, I have started using Aquanil again and it definitely hasn't worsened my skin in terms of acne, but my face is sooo much happier.
Aquanil is really gentle (so it's not going to really remove anything) but is perfect for lightly cleansing and normalizing your face. I can use it all day everyday and it will never dry me out, but after each time I use it, my face is just soft and comfortable - not squeaky clean, but it's clean. Mostly I use it in the mornings and after cleansing oil at night (which I use to take off makeup and sunscreen), and anytime in between.
I'll use it before I'm doing my makeup for a big night out so I have a nice, clean palette to work on. I'll even use it AFTER I use a gel cleanser to alleviate its drying effects - after a heavy workout, I'm not about to use an oil cleanser, nor do I trust Aquanil to really clean all the sweat and grime off my face, so I will use a gel cleanser then follow up with Aquanil - instead of feeling tight and dry, my face feels soft and comfortable.
Aquanil is such a godsend for me! Whenever cvs or drugstore.com have a sale, I tend to buy 2 bottles so I will never be without it...