Help! UTI trouble.

I don't know why but I keep getting UTI's. Yes, I wipe front to back. Yes, I pee and shower after sex. I just don't understand it. Sometimes it burns when I pee and sometimes sex is uncomfortable... idk if it's the lube, or soap. Im very picky about it. I don't know what else to do. I don't look fwd to sex because I don't want to get an infection. So, obviously I need your help. Any soaps, vitamins, lubes, or tactics y'all would recommend to avoid UTI's?!?