Welcome, Here is a copy of a post about a recipe that floated around here for awhile. Might help ya.

Ingredients for Homemade Scent Killer:
16 oz. (2 cups) Peroxide 3%
16 oz. (2 cups) Distilled Water
1/4 cup baking soda
1 oz. unscented shampoo (I use Cabelas hunting shampoo)
Mix in a large bowl (don't shake up in milk jug) so the baking soda dissolves) and pour into jug.
Let sit for several days, so the chemical reaction settles down, and don't leave in a tightly sealed container! I use a gallon milk jug with a snap on cap. You can use the above amounts in proportion for a gallon, you do the math. Use sprayers and fill them from the gallon jug.
Hope this works for you, good luck!
Just a reminder; if you put an airtight cap on this, it could pop off and make a bit of a mess. The wife probably wouldn't like foam all over her kitchen counter top.