I think the same thing for the Pig bags-get rid of the cloth fill tube and go to one like that Kirby has.The Pigs cloth fill tube can trap debris in between the cloth tube and the metal tube just inside it.And the cloth fill tube can get damaged by debris going thru it from that HUGE fan.One of my bags fill tube was shredded after cleaning up a basement reno job.The Pig gulped the stuff down better than any Shop Vac type vacuum.Fan was undamaged--it ate conduit box slugs(bent them over)A 6" piece of 14Ga Romex cable-many nails and cable staples-wood bits,sawdust,plaster dust.Had to replace the outer bag.My friend paid for the replacement.It was fun listening to the pig dinging and thooping that stuff into the bag!That Pig is still going strong to this day!!!!Contrast that to many shop type vacuums where the motor was killed by plaster dust and moisture.