Another Saturday, another thing to be repaired! I am having issues with my natural gas dryer. Sometimes it will not heat up, other times it will heat up and then stop heating sometime during the drying cycle. I have pulled the front access panel and I can see the igniter glowing red, and sometimes a few seconds later the gas will flow and it will burn with a blue flame with touches of orange. Other times the igniter glows red but I can hear a raspy hiss, not like a high pressure hiss, and the dryer does not light. I do not smell gas during this time. It has been doing this for the last week. When I initially cleaned out the lint chute and dryer vent it worked o.k. for about 4 days then started acting up again. I have cleaned out the lint chute as far as I can reach from both ends and vacuumed out the area behind the front access panel. Anyone have any ideas what the problem could be? The dryer is about 20 years old and otherwise is in good condition.