I just received a used wing-lynch 4e. This is a rotary film processor that is setup (in this instance) to do c41 and two types of black and white, The tanks that hold the chems are large (i'd guess 2+ gallons each) lucite boxes that are sealed except for a 1.5" diameter refill area. The tanks are suffering from a good deal of residue and I would love to know if there is a magic bullet for cleaning these things out. The opening is too small for me to scrub so I'm hoping for a solution that will remove the residue w/o damage to the tanks.

The chems used were D76, Tmax RS, Kodak fixer, Kodak Rapid Developer, Bleach and Fix.

Any help is appreciated.