Is there any maintenance on vent free gas logs that needs to be done on a regular basis?
Maintenance for the most part can be done yourself. Just good housekeeping! Take the logs off the burner. Take a brush (1-2″ paint brush with all but 1/2″ of the bristles taped up works good) and clean the burner ports. Clean the air intake. Clean everywhere that there is dust, pet hair, carpet fuzz, etc. There should be no soot on the burner at all. Make sure that nothing has changed with the set. Like extra logs or pine cones, or the logs positioned wrong. The pilot on a vent free is part of the ODS assembly. It gets dirty over time. Take a can of compressed air and blow the dust out. The pilot must be OFF. The ODS is where the pilot flame comes out. Go to the back of the ODS, you will see one or two holes, blow the compressed air in there. Then blow down the barrel of the ODS. Read over the installation instructions again and be sure everything is correct. Or call a gas fitter to perform the maintenance and perform a CO test.