I soaked my blowoff hose in PBW for an hour or so, then rinsed and let dry. There is still light amounts of residue visible. The only brush I own is a carboy brush which I don't think will fit through, due to the bent angle. Also, I'm a little worried that the brush might scratch the plastic. How does everyone else clean blowoff hoses? It's the standard width and basic length (cut and sold to me by my local home brew shop).