Perhaps a tip to everyone , I use the steel brush that came with another vape to brush off my roasting tube screen . Works very well and no need to soak or burn them. Any steel or hard enough plastic brush would most probably work too. @sixstringsmash . Not sure if your screen is too old to point of decomposition but maybe if you squish it or try to open up the walls it would fit tighter in your tube . Perhaps it was being used with a smaller tube therfor abit loose in tube you are using.