i use alcon solution, clean my o2's everynight even rub them a bit.
o2's still caused me irratation, my eyes would get really dry and red, to the point it looked like i was crying.

it started with a pair that i ordered in 2006, got another pair like that in 2007, though they weren't as bad. i'm giving mine one last shot, that i've just recently ordered.

probably try them again once my eyes get better from the last 2007 pair. it'll probably be a 2-4 weeks, i'll post back here when i do.