So we are renting this house and the gas fireplace pilot light keeps going out.. Sometimes its on longer then other times so I keep having turn it off then turning the know to pilot while pressing the spark button. Well the last time I did it it was on for about a minute and all of the sudden the flame got huge blew up mad a huge noise then went out. I turned it off and have not touched it since then. It is a hearthstone stowe model i think can someone please help.. oh and I have noticed that right before it goes out the fire gets really blue and wavy..