I don't use my oven pretty often but when I do, it usually ends up covered with baked-on food and everything. When it's dirty I don't even want to go in my kitchen. I use this company every now and then to give my oven a good clean. They really do a great job every time. To be honest, I'm not fond of scrubbing for hours and using a contractor for this kind of things is so much more convenient and time-effective. I'm very satisfied with these cleaners and I'll keep using them.