What this symptom usually tells you
The most useful clue is whether the problem is isolated or appears elsewhere. A local restriction often responds to trap cleaning, a sink plunger or a small hand auger.
- Test the second bowl if fitted
- Check the dishwasher connection
- Look for an accessible removable trap
- Note whether greasy residue is present
Choose the next step, not the strongest option
For a flowing drain with soft grease residue, compare a labelled kitchen-sink treatment; for a stopped drain, direct removal is usually more controllable. A repeat blockage, sewage backup or several affected fixtures needs diagnosis rather than another product.
- Check every nearby fixture
- Identify anything already poured into the drain
- Keep a note of gurgling, odour and water-level changes
- Stop before wastewater overflows
Step-by-step approach
- 1
Stop using the affected fixture
- 2
Check whether the problem is isolated
- 3
Remove only safely reachable debris
- 4
Try one suitable method if the signs support it
- 5
Escalate if flow is not restored or the symptom returns
Do not combine chemical products or use a plunger, snake or rod in liquid that may contain a corrosive cleaner.