Share 'Tips for clearing a chocolate-clogged drain?'

Our kitchen sink has started backing up on a regular basis. I try to get as much chocolate as possible into the trash so it doesn't wash down the drain, but inevitably some gets in there and builds up.  We have no garbage disposal.   Boiling water, enzymes, baking soda, etc. did nothing. Sulfuric acid and a snake finally did the trick, but even the acid doesn't seem to do much to chocolate.   Has…