this is a propane grill i bought last year. i live in okinawa, where it is insanely humid and wet (rust and mold THRIVE here). its been about six months since i last popped it open and i just spent quite a while scrubbing it but the rust does not seem to want to come off. is there a way to get it fully clean? or is this safe to cook on as-is? i’m willing to take any & all advice. i love grilling but never had anyone to teach me how to take care of it or how to do anything. thank you in advance!!!