Is it OK to add Essential Oils to an Evaporative Cooler (Swamp Cooler)?

I recently bought a Sunpentown Evaporative Cooler (also known as a Swamp Cooler). For those familiar with these coolers AND Essential Oils: Would it be OK to add a few drops of an essential oil (Ex. Lavender) to the Ice + Water input? I guess the thing I'm most worried about is the essential oil potentially damaging the plastic insides. If you CAN add essential oils to the Evap. Cooler, it would seem to make a nice diffuser :-).





Thanks for your help!Is it OK to add Essential Oils to an Evaporative Cooler (Swamp Cooler)?
Yes it's fine to do.

sunscreen