I bought a new filter from Wynn some time ago, and am having trouble keeping a bag air tight on the bottom. Did not buy any bags from Wynn, the filter is about 12 3/4" d. I found a dog food bag that is only a little bigger than the filter, and wrapped double sided tape around the filter before putting the bag on with a big hose clamp. Still get a smell of dust near the DC. Went over the pipe looking for leaks, and taped any where I could feel any air leaks, but wonder if my bag is the problem? What do you do about a bag on your filters?