Washing up liquid is a surfactant. It reduces the surface tension of the water, allowing it to slip past the clog more easily. It also lubricates the pipe and helps break down fatty or sticky residues that are trapping solids and paper.
This is for organic clogs (waste + paper). It won’t remove a foreign object (like a toy or sanitary product) or a solid mineral buildup. For those, you’ll still need a plunger or a plumber.
Yes, the same mild soap you use to cut through grease on a frying pan can also dissolve the “grease” of a clog—specifically, the organic waste and toilet paper buildup that’s causing the backup.
But for 90% of common household clogs? That humble bottle of washing up liquid isn’t just for dishes anymore. It’s a gentle, cheap, and surprisingly powerful plumber in disguise.
Here’s a short, informative, and engaging piece you can use for a blog, social media, or household tips article. The 10-Minute Toilet Unblocker Already Under Your Kitchen Sink