Lol oh I found out the difficult way, tried to use it one morning and it ran out all liquidy and smelly and even a weird yellow-white color. I knew it was time to throw that out lol.
It happened to me one other time, it was a little runny and very smelly, and I tried it and like I thought, it would not stick or dry or anything.
Thats been two times from the same brand (Ardell) and the second time I didnt even have it for 6 months I dont think? And I kept it in the box and everything. Huh...lol I am not buying that stuff anymore I want to try out DUO now