u/DEPRESSEDGURL899

I know this seems like a newbie question because of how basic it is, but I've seen too many people who skip this stuff, and I think it has great importance.
I don't wear too often but when I do(like today) I wear for a long period of time.
I’ve been in this diaper for like a whole day and every time I get tummy aches and physical pain (due to sitting in both sweat and urine). I never know how important baby powder is for an adult or a lotion but I really don't think that plain water and soap to the area is enough.
Also, how can I prevent odor for god’s sake?