On my 2003 1800 Goldwing the metal arms on the fuel level floats rusted. It produced heavy rust deposits in the plastic gas tank. I have wiped the inside and removed all solid deposits. I used no liquids, just a dry cloth. Is there further cleaning that should be done? If so, what procedure should be done? Can anything be done to prevent this from happening again, or is it just a matter of keeping the tank full?