I have been using the crock pot method for over a year now and it works great. I have been using the non toxic type but either works well. The heat range will depend on the crockpot. Mine only did a so so job on low after 12 hours so I tried high and the engine was clean in abour 8 hours. I usually take the carb off but not always. I rinse with very hot water then Pickle the engine with a generous dose of Marvel Mystery Oil's Air tool oil. I store all my engins in the plastic storage boxes you buy at Walmart, the kind that is about the size of a shoe box or what ever fits the engine. I also store all or the acc. for that motor with it. This saves a lot of time not having to find which mount or muffler goes with which motor. The boxes also protect from shop dust and rust.