Very effective. Tip for easy mixing: I used "wound wash" saline from the first aid section of the pharmacy. It comes in a sealed pressurized can. (Other kinds of saline, like contact lens solution, may contain preservatives). And the regular hydrogen peroxide in a brown plastic bottle. I measured 5ml of saline directly into the nebulizer cup, and added 0.03 ml of H2O2 into the same cup, approximating Dr Brownstein's dilution formula. I used a diabetic syringe (available OTC) to make the measurement easily, as the syringe is designed for that volume of measurement (1 unit of insulin = 0.01 ml).

That way you can mix it on the fly, without making batches and saving it in the fridge.