Review on Diversitech SG-1 Swoosh Big Shot Drain Gun, Red - Efficiently Unclog Your Drains with Ease! by Ernest Etienne

I used the last resort to clean the air conditioning condensate line. I made it with white vinegar. I've tried bleach. I've even tried a piping brush. Nothing helped. Finally decided to try it. I received the product, read the assembly instructions and tried it out. A soft "plop" can be heard, then a "whistle". After checking the other end of the condensate line, the blockage was resolved! I have to admit the CO2 cartridge doesn't look great (I ordered a pack of 12) but it works. Needless to say, if the first two methods don't work, I highly recommend trying this product!