"I don't follow my doctor's contact lens care instructions."
It's extremely important that you follow your eye doctor's cleaning and care instructions. Unclean lenses won't be comfortable, and they can spawn other eye problems.
Often people who complain that their contact lenses are uncomfortable are either not cleaning them well enough or wearing them too long before cleaning or replacing them. For example, if you have contact lenses that should be thrown out after two weeks, don't wear them any longer than that.
Read more about contact lens discomfort remedies.