If a Tornado Cloth becomes part of a clog then you have a really good clog on your hands because 99.9% of the time the cloth pushes the clog through. You have tried the pressure built up method to get the clog out but you may want to try that again in a different way. Turn the vacuum on using the on/off switch on the vacuum tank. Go to the closest wall inlet plate that has low suction. Open it, put your hand over it to build up suction and let go for just a second then put it back to build up pressure and let go for a second and repeat this for 5 minutes or more. This gets 99% of clogs out. If you can't remedy it that way then take a look at some of these ideas in solution #3 here www.builtinvacuum.com/flowchrt.html