I recommend getting a ready-to-use drain cleaner that doesn’t require any preparation such as diluting or mixing with anything. Though not as powerful as the Scotch Corporation cleaner, there’s nothing the Green Gobbler won’t clear given enough time. The manufacturer recommends letting it work for 25 minutes. But you can leave it for longer if you want. With slow-draining pipes, the manufacturers recommend pouring 250 millilitres of their solution down the drain. After that, you should leave it for 1 to 3 hours (preferably overnight). Flush the remainings through lots of hot water and you should be good to go.

Enzyme based cleaners will digest any obstruction in their way, and shouldn’t have any effect on your pipes. As the name suggests, the cleaner gobbles up all kinds of clogs including hair, soap, oils and grease. That's hardly the case here. All you have to do is pour the solution, wait for 5 minutes, and run the drain with hot water. You can repeat if necessary but that will seldom be needed. It clears slow-draining pipes and regular ones equally fast.Many users say they found pouring half a bottle to be enough to unclog the drain. Once the gel has done its job, the manufacturer recommends flushing the drain with hot water.

It clears everything from grease and oils to hair clumps and soap scum. For hair and large bits of debris, it works by dissolving them.

What to Consider When Choosing a Drain Unblocker

As far as slow-draining pipes go, it is best to add the same amount of solution to warm water, leave that overnight and rinse the next day with warm water. That being said the formula is most effective when paired with boiling water, so you might want to crank up that "warm" part to treat the problem on the first try. Carefully open the drain cleaner and pour the required amount into the drain. Make sure you follow the manufacturer instructions. With some bottles, you need to press lightly to squirt the cleaner. With others, you shouldn’t use any force at all. Given its potency, exercise extreme caution when handling it. One customer learnt the hard way how dangerous the cleaner can be especially if it gets in the eyes.