Depends if you have the money to have your oven cleaned for you. If I did, I would. I bought the oven cleaner. I think the products are basically the same, so just pick one for your budget (and check reviews). You can get spray that you leave in the oven and you can get bags to put the oven shelves in 9leave overnight). All pretty easy really. This one is environmentally friendly https://www.amazon.co.uk/HG-oven-grill-barbecue-cleaner/dp/B000IU3VU8/ref=sr_1_1_sspa?adgrpid=104178742296&dchild=1&gclid=EAIaIQobChMI4Lzxreim6wIVF-DtCh1_ZAT1EAAYAiAAEgLmsPD_BwE&hvadid=446615810628&hvdev=c&hvlocphy=1006886&hvnetw=g&hvqmt=e&hvrand=10122903030421041398&hvtargid=kwd-315942341240&hydadcr=18481_1816600&keywords=eco+friendly+oven+cleaner&qid=1597824584&sr=8-1-spons&tag=googhydr-21&psc=1&spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUEyN1BJWVdQU0IzRDQmZW5jcnlwdGVkSWQ9QTA0MTk1ODAxMElRMlZWOFhXVExDJmVuY3J5cHRlZEFkSWQ9QTAwNjM2MzExVkE3VjlJOUxKUVZYJndpZGdldE5hbWU9c3BfYXRmJmFjdGlvbj1jbGlja1JlZGlyZWN0JmRvTm90TG9nQ2xpY2s9dHJ1ZQ==#customerReviews