in addition to the advice already given, I would suggest not blinking and not putting on so many layers if you're running the mascara brush over your lashes more than once. Product tends to build up and increases chance of stickiness.
The mascara you may be using is super, so look for mascaras with a drier formula to prevent them from sticking. That or maybe use less on the bottom so it takes less time to dry?
your mascara could be old. and yes I agree mascara is great! I used to use only eyeliner but now I use thinner eyeliner in conjunction with mascara and it looks MUCH better..because without mascara your eyes feel bare with just liner unless you put on too much liner.
never had the sticky problem before. I think your mascara might just have aged. what kind is it?
i recommend maybelline the falsies (not the drama or flared, just the regular Falsies). it is amazing stuff. and waterproof mascara is probably more sticky than washable, in any brand. just buy a new tube from the drugstore.