You might have ductwork that needs sealing because of air leaks. The duct tape that you put on last year might have dried out and become loose. Now it has to be done all over again. There is new foil tape with peel-off backing that works much better. The best choice would be a can of duct mastic because it forms a lasting seal anywhere two pieces of duct come together. And that's the On The House tip for today.