Installed one of the diffusers in the driver's side deflector. I used honeysuckle essential oil as I didn't want to overload the machine. I dripped about 5 drops onto a felt pad and was on my way. When the fan was adjusted to blow air through the vent, the smell quickly filled the machine. I then turned the fan off, which reduced the airflow but didn't stop it completely. That kept the taste at the same level. Very satisfied. Let me pick exactly the scent I want, unlike air fresheners which are limited. The four mounts come with 48 felt pads that should last a while. The current list price is around $13. Saw it elsewhere, exactly the same, for about $45. Buy now if you want. highlighted.
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