Ugh, I hate hate hate hate hate Opti-free Express. I guess I would love it if I enjoy that burning sensation followed by the insti-dry feeling, but I'm not a big fan of either of those.
I really miss the renu with the moisture-lock (they don't sell the version sans moisture lock here), but in the meantime there's some Finnish stuff called Bio-soak that's very much like the Renu, I'll take that over the opti-free.
One thing with contacts back in the US. AC killed my eyes. Most people seem to like the AC and ceiling fan combo and between the two, and using Opti-free, it was like my contacts had wooden frames. I actually ran out of eye drops and mom and I both would rip out our contacts first thing once inside the house.
Meanwhile in this climate I can wear them 12, 15, 20 hours without issue, whether or not I use eye drops is personal choice, and certainly it's a lot nicer now that I got away from Opti-free.
So for those of you in a heatwave, and putting up with AC and ceiling fans, I feel your pain.