E.T.
hi, Angie! have you tried liquid fabric softner watered down?
My husband's previous job was a restoration company, when we would get in our car after a rainy day he would do this to prevent the mildew smell to last long! we simply put it into a spray bottle we bought - and it worked Great!!
i hope this information i left you realy helps, i had no idea it would until i tried it myself! Good Luck!!