Best way to clean a gas tank

[gabowman]

Put you a big hand full of flat washers in the tank and some gas and shake it all around, them washers will knock all that stuff lose . Pore all that out and rinse with some more gas , works good with plastic and metal cans. Been doing it for years.

I have always used a handfull of BB's.

I've always used a double hand full of rocks.