Is that a solution where you make the filters / cellulose pads wet to provide cooling?
For how long have you run them? Max temp.?
Send a PM, interested in your solution.
Is just water at ambient temperature.
The first containers was made a year ago. It provided a cheap and efficient solution.
For best results next step will be use cold water. But we not have tested that option yet.
Outside temp is 32c
https://imgur.com/P0wkYjEand behind the pads is 28c
https://imgur.com/r7OfrrW