Carpet & Mattress freshener:
I like to go to a wholesale market (Sam’s Club or Costco) and get a large bag of baking soda. I use it with several cleaning items through-out my home. Then I’ll take a large tupperware container or even an old “meal replacement shake container” and use that to mix and store it in.
I’ll give you a few suggestions on what oils to use when dealing with what:
Dog Odor: Lemon, or a citrus
Mildew & Mold: Lemon & Melaleuca
Bed Bugs: Cedarwood, or Arborvitae