I've been using an old wine glass cleaner that my wife bought at the store, however, I didn't know what it was or where to get a new one. After searching on the internet I found out that it is a wine glass cleaner. My old one finally broke, so I bought a new one from the internet. They cost about 5$ apiece. I've been using it to clean soot out of a 4" diameter body tube that utilizes a piston for chute ejection. I can attach it to a long wood dowel using duct tape to reach faraway places. I've even placed baby wipes on it to pick up soot, but I need to be prepared to find another even longer rod to push the out the lost baby wipes. With some force I've been able to clean up a 38 mm motor mount tube, but again be prepared to push out the wine glass cleaner with a long rod. I think this could be used clean out 38 mm and 54 motor cases.