well, f420 comes with like a blue cleaning solution but at the bottom there is salt. salt does most of the scraping away of the resadue but it doest scrape up your piece. the cleaning solution like makes it look shinier and like it eliminates the smell. i tried cleaning my piece with bacardi that didnt really work and hot water worked a little although i probably wasnt doing it right. but where i got f420, it is 10 bucks for a 12 oz bottle so i personaly think it couldnt hurt getting a bottle of f420