Had a gas smell inside drum and from outer vent during recent use. 1) Cleaned removable filter/screen with soapy water. 2) Disassembled and removed filter/screen chassis inside drum for access to chassis sump and front of duct. 3) Removed a surprising amount of debris; lint, coins, bits of paper of about a 1/2 cup in volume with some density but no actual blockage. 4) Removed and cleaned vent tube from back of dryer to wall; nothing of note. 5) Rubbed and vacuumed internal duct from filter/screen chassis to back of dryer; nothing of note. 6) Reassembled. Ran a load. Seems fine. Thank you for posting.