I have remove front panel to examine condition. Not much lint or dirt cleaned thoroughly.

First alerted to possible condition was I was out side house smelled slight odor of gas near vent. I went inside found dryer not heating. Shut it down. After removing cover examining basics and cleaning, started dryer to see cycle, infighter comes on gas flame starts, then after a few seconds it will go out. First time cycling it stayed on much longer. After the flame goes out though you can smell slight odor of gas like it is feeding very low pressure?
I did read forum on similar events with different conclusions, Any help on what to check or a way of eliminating each part without guessing Or if this is common relating to one particular part or combination of parts

Thank you

Jim