Poured 1350ml, in 3 , 30min intervals of the cleaner as specified in the instructions. Let's it sit overnight and nothing happened. This was on a kitchen sink, 1.5 inch drain size and was poured through 2 inches of standing water.

I tried it the first time on our SUPER SLOW DRAINING shower floor. I got an 80oz bottle. On the first attempt, I poured maybe a third of the bottle to the drain. Waited 30 mins and then poured 4 gallons boiling water and it was still slowly draining. I was very disappointed. On the second attempt, I poured the rest of the bottle and went to sleep. Maybe 4-5 hours later I poured another 4 gallons of boiling water and everything flowed nicely. No more clogged.

I had a very slow moving drain. I followed directions exactly and put half a bottle in the sink, waited 30 minutes and put hot water down. Didn't work, so followed the directions that said if it doesn't work first time repeat so I did, now my slow moving drain is completely clogged.

I believe I followed the instructions correctly when attempting to unclog the drain. I poured the entire contents of a small bottle of Drano Max Gel Clog Remover down the drain. After applying the drain cleaner, I allowed 30 minutes for the chemicals to work on dissolving the clog as per the product directions. Once the recommended soak time elapsed, I used the shower faucet to flush the drain line with water. However, I only ran the hot/warm water for approximately 1 minute to rinse out the chemicals and dissolved debris. Initially, the drain appeared to be unclogged and functioning properly after this treatment when I took a shower. Unfortunately, the drain has now become clogged again after 4 days of normal use. While I made an effort to follow the Drano usage instructions, the 1 minute hot water flush may have been insufficient to fully clear the drain line, leading to the clog re-forming quickly after just a few days of use.