Mildly Interesting

I would try and light it outside, but with a long stick (like a wooden skewer). There is a high chance that those are O2 bubbles, if you were trying to make some Sodium Percarbonate which is a common additive to laundry detergent anyway.. It's supposed to be equal parts mix, but I suspect the excess of hydrogen peroxide is intentional as to have the best chance to convert all the sodium bicarb and still have plenty of liquid to soak something in. (Just a guess. Chemistry can be a weird science sometimes and I think there were a few reactions that could of happened here.)

Consumer grade hydrogen peroxide is dirt cheap, and so is the baking soda. I dunno if you saved money and a made a more effective solution for what you are trying to accomplish. A spoonful or two of regular laundry detergent may have masked smells a little better. Dunno. I like science but I also like efficiency, so whatevers! (Experiments are fun.)