im knee deep in my mash tun creation i have a spacing of 2.25 inches in between each pipe. using 1/2 uinch copper pipe have it all slotted with my dremel and it fits with a spacing of 1 inch to the wall. Now i cleaned it all out with soap and water to remove the copper powder from cutting the slots in the pipe.. There are some serious pieces of copper hanging inside the pipe line though.. i need a suggestion or 3 how to cheaply clean out these copper pieces hanging from the slots. a wire brush would work well BUT the pipe is 16 to 17 inches long. please advise.