Does anybody use timers (the plug type) on their simple window air conditioning units? We moved and are now dealing with 2 window units in kids' rooms (considering replacing as they're a little loud and old, need to talk to land lord), but usually had ac on for few hours then switch off. Just don't always want to stay up to switch them off ... Was thinking of putting the plug timers in? Experience, where to get heavy duty ones (only finding lots of Alibaba links). TIA.