Where do you even start with a Quantum Toaster on the fritz?
First, make sure you're not just experiencing a temporal displacement anomaly.
Check the Toaster's Quantum Flux Capacitor for any signs of quantum entanglement.
Has your Toaster been experiencing:
For more information, see:
Quantum Toaster Troubleshooting Section 4: Advanced Quantum Mechanics
Quantum Toaster Troubleshooting Section 5: Quantum Flux Capacitor Maintenance