Drain Unblocker Powder with Cold Water: It doesn't work. Nothing at all, even in a clogged drain that I simply blocked with soap and hair. The powder with hot water did a good job, but this one with cold water doesn't do anything at all.

Quite a good product. The only negative thing is that it took a few hours to work for me. According to what I read, it unclogs immediately for others. At least the result compensated me. The sink looks brand new, really. It costs one euro at the supermarket. Why is it more expensive here?
P.S: I used the blue one (cold water)