So on the GF basic and plus, the fan is located on the left hand side of the unit, gently pull the laser gantry toward you and you can see the fan pretty easily, and you can reach in there with a bottle brush, or compressed air, OR BOTH and give it a spiffy wipe, these will help with air flow between deep cleanings. no chemicals needed!!!
Worth mentioning that this is the exhaust fan. There are three other fans in the unit (at least. Maybe 4, might be one in the power supply).
There’s an intake fan, an air assist fan, and the fan that keeps the head clear.
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