This might be a dumb question but I recently purchased a ridgid 6 gallon wet/dry vac and it has the normal intake on the vacum side but on the other side it has a blower. I know the blower side is also used for various clean up. Everytime I use the vac the blower is blowing air out which means it is blowing out dust and debris when I am vacuming. Am i doing something wrong or is it supposed to do that? Can I cap it somehow?