Drain Power Sucks
I too have used Drain Power some time in the mid-1970's. Mom's bathroom sink was very sluggish, getting to the point where it took a long time to drain. How we ended up buying this totally ridiculous product is unknown. It did work. But why we never thought to just grab a plunger and plunge the heck out of the sink is unknown. Obviously many other people also never thought to use a plunger, so Drain Power enters the market.
I can't think of a more wasteful product than Drain Power. It's a can of compressed air, packaged in plastic and metal, ends up in landfill where it will stay for 10,000 years. Archeologist in the future will be totally puzzled by the purpose of the Drain power can, possibly thinking it was used as a "marital aide" for infertile couples.....