You hear it often -- empty your RV's sewer (black) tank, drop in a bunch of ice cubes, then drive around so they bang against the sides of the tank, unclogging them and helping your level gauges work again. Does this really work? RVtravel.com technical adviser Dave Solberg has the scoop.

The product he mentions, Tank Blaster, is available at Amazon.com: https://amzn.to/3zNeri9

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