I'm trying to get an ATV running that was left sitting for a number of years. The fuel in the tank appears to have dissolved the plastic filter sock and left a slimy mess in the bottom of the tank. Does anyone have any experience with some sort of solvent that will clean the sludge from the bottom of the plastic gas tank?

This is what I scraped out of the tank.

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95 Montero SR
3.8 MIVEC, Advance headers, 2 1/2" exhaust, Magnaflow muffler, OME shocks & rear springs, 2" body lift, 3" tank lift, 4.90s, TRE front locker, factory rear locker, Roger Brown Rock Sliderz, 315/75r16 (35") tires, Sport big brakes