Well, maybe. Because I didn't RTM (read the manual), I cleaned my cat by using an air compressor with a high pressure nozzle. Now I find out that that's a no-no. Here's the quote from the Woodstock website: "It is not a good idea to clean your combustor with an air compressor unless you can ensure very low pressure. Using high pressure air to blow the cell free of fly ash build up can also blow off the precious metal coating inside the cells." What do you guys/gals think? Have I damaged the cat beyond repair. It still glows after it ignites. I can see it through the glass. Stove still gets up to 500 degrees outside/1000 degrees inside. Any other way to tell if it's been damaged?