Essential Oil Pad Retainer - LEVOIT 2.5L Humidifier

My new, but ultra-basic humidifier (LEVOIT Top Fill with 2.5L Tank, https://tinyurl.com/4t66ww84) does not have any ability to use essential oils for therapeutic or other mood-setting(?) purposes, and the instructions explicitly state NOT to add oils to the water directly. So I made this. It simply retains a small felt pad with a light friction fit (I'm using a dense felt pad that is usually used for the bottom of furniture legs to prevent scratching the floor; the nominal 2" circle fits perfectly and you just trim one edge to provide through access to the vent hole. The adhesive backing is irrelevant, it won't stick anyway.

Any other relatively dense, absorbent material would/should work. I've tried cotton, like the round thin. cotton pads used to remove makeup, but it's gets very soggy and doesn't actual absorb as much oil as you'd think.

Trim the pad with fuzzy side facing out and lay it in the vent cover, and press in/over the retaining "basket." It's a light friction fit and there is a slight counter-draft angle and relief slits to help lock it in. Press it until it bottoms out. Beware the stock part is very thin and prone to cracking. I cracked mine while prototyping so print and see how snug it is and adjust accordingly so it just slips in. The way it sits on the humidifier means it doesn’t need to actually hold very strongly, just its own weight really  

Add drops of whatever essential oil you like to the pad and replace the vent cover. As the mist is blown up and across the face of the saturated pad it will infuse the mist with whatever youve chosen! Ooh-la-la!

FWIW I printed in PETG because that's what had loaded but I imagine PLA would be fine as well. Stock profile settings 0.4mm nozzle on my QIDI Q2. White might be less obvious but seriously who is looking that closely?!