Chafing from wearing at night

Hello, I'm kinda new to chastity, I wore cb6000 and holy trainer v2 many times for couple hours at a time before, but recently I tried to keep myself locked for couple of days (in holy trainer), I was almost able to forget about it at day, but I had problem with sleeping.

I woke up several times every night with "erection" and pain where my skin connects to lower part of the ring, everything else was fine. After unlocking myself 3 days later I still felt some discomfort in that place, now I feel better and I want to try again.

My question is should I use the same ring or try bigger one or even checkout a smaller one? (with bigger one it's kinda easy to pull out balls with lube while locked) And what else should I do to make my experience easier? I heard some tips about using lube and baby powder couple of times per day, but am I really supposed to do it every day as long as I'm wearing it? Because that sounds very inconvenient.

I can buy and try different cage if needed, but I hope to fix this problem without resorting to stainless steel cages.