My brother has been in a mental health rehab unit for about 9 months. Due to his breakdown his house was in a state, and we are now looking at preparing for his discharge home. His fridge is filthy. I’ve managed to prise the trays out and clean them using a combination of fairy liquid, soda crystals and lye. The inside is caked in a kind of putrid smear composed of old rotten food. . How to clean it ? I’m not sure how to go about it. Chucking the fridge out and getting a new one isn’t t an option due to finances. Any advice appreciated.