The Rainbow wands are steel not aluminum. I just take an SOS pad and a wooden dowel and push the SOS pad through the wand, if the wand is curved I use a metal rod that will bend.
As for cleaning the non electric hoses I just run water into the hose and slosh it back and forth to clean out the hose. Then hook it up to the exhaust of the vacuum to blow it dry. Sometimes I'll take a section of paper towel and blow that through the hose as well to help clean it out.
If it's an electric hose I take the handle end off then clean the hose and dry it then reconnect the wires and put the handle back on. The machine end with the pig tail is pretty well sealed.
