Re: gas can cleaning
Fit a hose to the end of a power washer, insert hose and go to town. The nuts/bolts shaking method works, but can you say molasses? About that fast. Hose it out, clean it out with carb cleaner or other solvent, then get a tank resto kit (aircraft/motorcycle) and follow the instructions. You'll have a very functional tank afterwards. The kits are good for several tanks.