Ford F150 - odour from pannel vent.......?

Anyone ever get a gym sock smell when using the outside air panel option....my airconditioner has no smell, nore does my heater, just the cold outside air......?

If the smell is only there on Fresh Air vent, remove the wiper arms and plastic cowl panel, that is where the fresh air comes from. very possible something crawled up and died in there,have seen this several times, if you do not find anything, spray Lysol in this area profusly!!!! and see what happens