I am cooking various food at home in a new oven that I am kind of stuck with. We're renting and this is the only oven we have at the moment. It has four gas stoves at the top.
The oven is fan assisted but it is a cheap fan and an old grill and oven. Daewoo Cooker DCG5050SI
Basically it burns all my baked dishes. Burns the bottom of the cakes. I always make brownies, cookies and various cakes and no matter what I have tried--the different shelf rack, placing an extra tin. Nothing helps. My cakes always burn at the bottom. What are some tips to prevent this? I've even tried to cut the cake half way or at the end - and ended up with messy food.