Safety first: Turn off the disposal before adjusting any parts at the sink opening.

Inspect splash guard:
- Check if the splash guard/baffle is present in the sink opening.
- Inspect for tears, warping, or improper fit.
Reseat or replace:
- Ensure the splash guard is fully seated in the Moen sink flange.
- If damaged or missing, install a Moen-compatible replacement splash guard.
Adjust water flow:
- Use moderate water flow; extremely high flow can cause splashing even with a good baffle.

Moen garbage disposal splashes water and food back up into the sink while running

Possible Causes