Disposal runs but water drains very slowly from the sink, often backing up during use.

Safety first: Turn off power to the disposal before disassembling any plumbing.

• Plunge sink: Use a sink plunger (with the other sink bowl blocked) to attempt to clear minor clogs.
• Clean P-trap: Place a bucket under the trap, remove it, and clear any sludge or solid buildup.
• Inspect horizontal run: Use a small drain snake to clear the pipe leading from the trap to the wall.
• Check disposal outlet: With the drain disconnected, inspect and clean the outlet port on the Miele disposal.