Shot Glass Fungus Gnat Trap
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Funnel-shaped lid which sits on top of a plastic shot glass to make a fungus gnat trap.
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- Printables
- Kategoria
- Other House Equipment
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- Creative Commons — Public Domain
Designed to fit loosely on a 41mm (outer top diameter) plastic supermarket shot glass.
Print upside down, with the point of the funnel pointing up. No supports required.
Ideally print in a bright colour, such as yellow or orange, to help attract gnats to the trap. I have found it also helps to position next to a lamp.
It's probably technically best to use PETG for chemical resistance, but PLA will probably suffice.
Requires solution to attract and kill gnats. Leave a gap between surface of liquid and bottom of funnel.
I have had a lot of success with an alcoholic base, with added sugar, orange squash, and a tiny lump of non-scented bar soap (to break surface tension). It is commonly recommended to use apple cider vinegar however, which I have not yet tested under ideal conditions.