I think it was Barnartist that asked about a cleaning brush to really clean the boiler tubes. I went to the hardware store this morning and came up with this. Items: one 36" steel rod, one cable tie, and a 2 inch wire brush that fits on the end of a drill. I hooked them all together and it work really, really well. I thought I had cleaned the tubes pretty well before, but this takes everything off down to the metal. The only problem I had was that I hadn't cleaned for quite a while and the tubes were pretty bad. The brush would heat up and the creosote would coat the wires. I just let it cool a minute and then beat on the brushes to chip it all off. Someone that has a shop should come up with something like this with set screws so you wouldn't have the cable clamp. Could make some money. I have a total of under $7.00 into this (not including the drill!!).