The dust filter is located above the print head fan. This filter can become fouled up over time and it is recommended to clean it once a year or every 10,000 cards depending on your working environment.
Open the printer cover. Locate the dust filter.
Remove the filter by pulling it upwards and slide it out to release it completely.
Once the filter is removed from its slot, obtain a cleaning wipe supplied by Evolis.
Clean the filter by rubbing the wipe either side of it.
To replace it, insert it in its slot (notch towards you) and lower it until you hear it click indicating it is correctly positioned.
Close the cover.