I wanted to share an experience I had yesterday for the first time while using my truckmount.  While cleaning the halls of an apartment building my Butler Truckmount started to lose suction.  I cleaned the filter bag and checked all the usual places a problem might occur .  The 50 lbs of Ice melt that the owner had put down on the walks/carpet had caused a clog in the suction line.  After I had cleared the line, the stuff was literally like a rock of salt in the filter bag.....  Damn Ice Melt!!!!!  just 1 more reason I hate this business in the winter!!!!!!