You might want to try a different brand if you can. A brand I had worn for years without problems really started to irritate my eyes, and on the advice of the optometrist, I switched brands. I've been fine ever since.
I grew up in Southern California and then spent some years in Texas. Now I'm in Western Washington. Fun fact: I've been to about 20 countries and I still owe the tax you're supposed to pay to leave Colombia.