How to unclog a kitchen sink drain with washing-up liquid

Clear a slow kitchen sink drain without taking the pipes apart. You pour washing-up liquid down the drain, let it sit, then flush with hot water. It suits anyone with a lightly clogged sink caused by grease and food residue.

SECRET Plumber Trick: Unclog Drain in SECONDS 💥 (Extremely simple) 🤯, by Smart Fox on YouTube. 2 min 2 s.

Video length
2 min 2 s
Time to do it
20 minutes
Difficulty
Easy
Steps
6

What you need

Steps

  1. Pour about half a bottle of washing-up liquid straight down the drain opening.

  2. Leave it to soak for 10 minutes so the soap can break down the grease and dirt.

  3. Close the plug and fill the whole sink with hot water.

  4. Pull the plug and let the full sink of hot water drain away in one go.

  5. Run hot water for a few more minutes to flush the loosened residue through.

  6. Check the flow. If it is still slow, repeat the whole process once more.

Tips and common mistakes

Use hot but not boiling water so you do not damage plastic pipes or seals.

This works best on grease and soap scum, not on solid blockages like hair or food chunks.

Do not mix washing-up liquid with bleach or other drain chemicals.

If the sink still drains slowly after two tries, the trap or pipe probably needs cleaning by hand.

Questions

Will this work on a badly blocked sink?

It works best on slow drains caused by grease and food residue. A fully blocked pipe usually needs the trap removed or a plunger.

Can I use dish soap on a bathroom sink too?

Yes, the same method works on bathroom sinks, but hair clogs often need to be pulled out rather than dissolved.

Is washing-up liquid safe for my pipes?

Yes, it is mild and safe for normal household plumbing when used in small amounts.

This guide was drafted from the video's details and general task knowledge. It has not been checked against the full video. Check the video and relevant product instructions before following a procedure. Report a correction.

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