New microfilter change - smells like feet at first every time the fan is on.

[jeremym]

Hey all, recently my truck was in for some warranty work and they replaced the micro filter. However, any time I turn a function of the HVAC on, it blows air that smells like feet or something rank. Almost like they gave me a swamp-soaked used micro filter. Anyone else have this experience? It makes the first minute or two of any HVAC function almost unbearable and I have to roll down all the windows to get the smell it dissipate fast.