Cleaning and storing queen excluders, supers and frames for winter — propolis, freezing, stacking?

Ontario, second year, three hives, and my garage is now a pile of sticky stuff: three metal queen excluders caked with propolis and burr comb, six medium supers of drawn comb, and a stack of empty frames. Last year I just left it all in a heap and found wax moth webbing in April, plus a mouse nest in one super. Not doing that again. So, what's the actual routine? For the excluders — scrape, freeze, torch, hot water? I've heard the freezer makes propolis snap off but I've also heard hot water warps them. For the supers — freeze each one for 48 hours then stack? Do you leave the stack open to light and air or seal it? And can a cold Ontario garage do the wax moth job for me? Any product that's actually safe on comb?