Monday, at dumpsters saw a stack of saw blades. Don't know what they had been cutting, but they were gummed up- BIG TIME! Brought two 12", 60 tooth blades home with me. Today spent about 30 minutes cleaning them (LA'sAwesome, pizza pan for soaking, and a tooth brush.) Was amazed at how sharp blades were, once I removed all the crud. They won't need to go to Dynamic Saw anytime soon.