mobile

Hey guys. so I got my LG G3 like 5 days ago and the phone is awesome, already rooted and installed the cloudy 2.2 rom on it.
Everything is well except from the overheating issue, the phone overheats fairly fast under heavy use ( such as gaming ) and normally I wouldn't really care about something like this as my nexus 5 used to overheat a lot as well.. But my issue is that when it does overheat then it reduces my brightness from 100% to 90% even if the auto brightness is off.
I always love being with 100% brightness when i'm at home, and I like gaming in 100% brightness as well.. I know that this mechanism is PART of the phone but is there ANY way to fix this issue? it's sort of annoying.
Please, before people tell me to wipe / factory reset / new rom / REPLACE THE PHONE(!!!!) I would like to hear standard solutions first, as I am NOT in a rush to replace a phone I bought 5 days ago ( and because it's not a rare problem I mean every LG G3 has it ).