Aw darn, that's a pain. One of the other students (I think it was Xanous?) stopped using RCs because he had the same trouble. If you become lucid and are aware enough to not need to RC, then yeah, don't bother. Perhaps just move on to stabilization.

I've not had a RC fail me, but I use the nose plug. I usually RC twice, because it's difficult to tell what the result of the test was the first time. But I usually either RC out of habit, or out of suspicion. It's uncommon for me to know that I'm definitely dreaming. Just do what works for you, kraom!