Washing up liquid is a legitimate, safe, and inexpensive first-line treatment for toilet blockages caused by organic matter and excess toilet paper. It is most effective when combined with hot water and followed by plunging if needed. It will not solve blockages from solid foreign objects or deep sewer issues. For persistent or complete blockages, a mechanical auger or professional plumber should be consulted.
| Method | Effectiveness | Chemical Safety | Cost | Risk to Toilet | |--------|--------------|----------------|------|----------------| | Washing up liquid + hot water | Moderate (soft blockages) | Very safe | Very low | None | | Plunger only | High (most common blockages) | Safe | Low | Low (scratching) | | Caustic drain cleaner (NaOH) | High but slow | Dangerous – fumes, burns | Medium | Can crack porcelain or damage pipes | | Toilet auger (snake) | Very high | Safe | Medium–High | Low if used correctly | washing up liquid unblock toilet
An Assessment of Washing Up Liquid as a Toilet Unblocking Agent Washing up liquid is a legitimate, safe, and