Bad smell coming from inside the refrigerator even after basic cleaning.

Safety first: Unplug before deep cleaning internal components.

Step-by-step cleaning:

• 1. Empty and clean: Remove all food and shelves. Wash interior surfaces with a solution of bicarbonate of soda and warm water.
• 2. Clean door seals: Gently pull back the gasket folds and clean with mild detergent, then dry thoroughly.
• 3. Flush drain: Clean the internal drain hole and channel as described in drain-related entries.
• 4. Clean drip tray: Access the rear drip tray above the compressor, empty any stagnant water, and clean with disinfectant.
• 5. Air out: Leave doors open for several hours to ventilate before restarting.

When to call a technician: If odour persists and seems chemical or burning, stop using the appliance and seek professional inspection.