I use dry lube all the time on my press, it doesn't hurt anything at all. On plastic sliding parts, like Lee presses are made out of, I have found that Silicone works better though. It last longer than dry, aerosol lube does.
I have a can of American Industries dry lube but I can't say it's any better than CRC dry lube that you can buy at Wallmart.
I have a humidity gauge in my loading room because where I live, in winter, it gets like a desert around here and static is just awful.
I'm already having trouble with static cling in my measure, Pa wasn't any different, in fact I think it was worse. Once it gets really cold out. like below freezing, the static is a real issue. No moisture in the air.
It's not the powder, it's the time of year.