CLEANING FUEL TANK FOR DUMMIES
Drain Fueltank and remove tank from S21
Drop 3 or 4 handfulls of coarse chip and 2 litres of petrol into tank (only the coarse chip not the fine sand that comes with it)
Shake vigorously upside down, right side up, left, right, north, south, east, west, south east, nor nor west, etc.
Empty tank onto your neighbours lawn, taking care to spell "Cunt" with a capital "C"
Pour 2 more litres of petrol into tank, shake vigorously, smoke cigarette, empty pertrol into toilet cistern (or behind garden shed, into your little sisters diesel Daewoo, in your ex girlfriends shampoo etc) smoke more cigarettes (repeat 3 times)
Pour 2 litres of methylated spirits into tank - swish around firmly (not shake) drain meths ensuring to filter through a loaf of bread and keep the remanants for Friday night drinkees!!
You now have a nice clean tank..
I recommend adding a quantity of fuel tank sealer and turn tank regularly while sealer is drying/follow instrructions on bottle of sealer.
DONE!!