I have a G45 powered Weeks Special that I fly once or twice a year. In between flights I hang it in my shed in Arizona. It gets hot in there.
When I take it out to fly I just cycle the batteries and go fly. I never do anything to the engine other than gas it up. I have been doing this for five years.
Sometimes I have had trouble with the servos. I had to clean the connector contacts.
Lately the engine does not seem to want to transition well. I may have to put in a carb rebuild kit.