We have just returned from 2 weeks away in our '08 Monarch. We were plagued by problems with the grill on our oven. This was a problem that was reported before its 3rd service in December. Sometimes the grill just wont burn fully, and I dont mean the middle part. To all intents and purposes, there just doesn't seem to be a full amount of gas flowing to it. Anyone had a similar problem and what was done about it please? How does the front panel that has the valve on the back of it, come off? If I could remove the valve and either clear or replace it, then I might be able to have toast for breakfast!