u/CyberCow3000

Me and my friends are renovating a house the have inherited, and it was owned by their grandma who almost never cleaned anything. The fridge is at most 5 years old, and in a perfectly working condition, but with one problem: it has likely never been cleaned. There were stains everywhere so caked in, that the only way we could remove them was sanding out the paint at those areas. There's also a very strong smell, which we can't get rid of. We tried grease remover, washed it twice with 20% vinegar solution, but no luck. Is there any other way?