Sep 27, 2019 - 07:06 AM
I would recommend to clean out the fridge and wipe it down and make sure that they can't get inside through a leaky seal, etc. Other than that, hope that this is a fluke and it cycles out in a few days. Gnats are not attracted to fruit fly traps, so those will not work in this situation.
CB-80 will work to kill gnats that may be flying around in the kitchen - https://www.epestcontrol.com/pest-products/536-1807-CB-80-Fogging-Insecticide-W
ith-Pyrethrum.html It can also be sprayed inside the fridge if it is empty to kill them. Be sure to wipe it down and clean it before putting food back inside.