Our propane heating stove (only heat in house) has developed a mind of its' own. All of a sudden the flame is higher than normal (did not change the setting) and is putting out soot. The glass window becomes covered in a matter of hours and some is going into the living room on the ceiling. We live in No. CA and did have some big wind and storms last week, but this has just started. Any suggestions on what be causing this? It is makinga mess. Thanks....