I have never heard of anyone using deodorants under the wafer, I personally would think it would compromise the adhesive ability of the wafer. So I wouldn't advise you do that, it could also irritate your skin and end up with all sorts of problems. You can use specific odor drops made especially for your bag from your supplier. I often spray some perfume on my stomache near the pouch just to make me feel better about
any possible odors. Just be very careful about
what you spray under the wafer and near your stoma. Take care
Doreen