Pick up any accessible sand and mud before another cycle. If the particles also come in with fresh water, check the water supply: the problem will not be solved by cleaning only the tub.
Did they come in with the clothes or with the water?
If they appear after a load with dirt, start with the residue from that wash. If they come back without dirty loads or coincide with work on the line, check the water at other points and consult the supplier or the person responsible for the installation. Do not use a cleaning test to confirm potability.
Remove the particles without dragging them across the finish
- Leave the appliance empty, stopped, and cool; disconnect the power for the manual work.
- Collect the visible deposits with a soft cloth, lifting them and removing them in small amounts. Do not repeatedly rub dry sand on metal or glass.
- Clean the reachable edges and folds without pushing material through perforations or under the impeller.
- Check the maintenance of the drain filter if the model has one that is accessible. Handle retained water first.
- Only after removing it, run the approved empty-cleaning cycle and observe the result.
Do not tilt the machine to get sediment out or disassemble the pump, tub, or valve. A heavy buildup out of reach may require service.
What to do if it happens again
If it seems to come from the inlet, check the supply screens according to the manual. Do not remove them permanently to prevent clogging. If the source was a load, drum cleaning lets you finish removing the surface buildup without turning it into a repair.
A new scraping noise, failure to drain, or residue that does not decrease justify stopping the test. Adding descaler or detergent does not, by itself, remove a trapped amount of sand.
Identifying the source avoids repeating a cleaning that the next fill would undo again.