We are looking for a better way to clean our chainsaws after using them for cutting roofs, other than the current method of using brake cleaner, mineral spirits, wd-40 or whatever we have on hand. Looking into a parts washer, but, most of them say do not use flammable or petroleum based solvents. Is anybody having any luck removing the tar and gunk using any of the citrus or other non petroleum based solvents? Trying to keep this as inexpensive as possible too. Some of the degreasers I have seen are pretty expensive especially if they don't work very well on hardened tar.

