Leaving it alone is ok. Try to oil it a bit on every metal part and get some silica salts in there to help keep the moisture out.
Thing to be careful about the aeg is to make sure the piston has fully cycled so that it doesnt stay in a compressed state and lower the tension of your spring overtime.
You should still charge the batteries a couple of times during that period so that it does not start to degrade.
All that comes to mind right now.
Certified Level 2 BA Sniper
Si ton épée est trop courte, allonge la d'un pas. ( Proverbe Hongrois )