Q. If someone stores in the garage smelly garbage cans, that often contain diapers too, is that garage exempt from a Mezuzah?
A. Horav Shlomo Miller's Shlit'a opinion is that the garbage cans should be kept inside another bigger container, that also shields and protects from the smell.
This applies even if the Mezuza is placed as usual on the outside of the garage door, since often people may say a brocho or words of Torah inside the garage.
Rabbi A. Bartfeld as advised by Horav Shlomo Miller and Horav Aharon Miller Shlit'a