I was wondering what’s with these wet spots I see on some off the leafs?
Leaves will sweat and produce condensation periodically.
Keep an eye on your humidity and set a dehumidifier close /back of your grobo if its too high and add a small fan inside.
If you see the water just dry them off with a paper towel to keep insects and mold at bay.
Plants are super sensitive to changes in humidity, even if it’s outside of your GROBO unit. Most plants shed water a bit prior to rain or a change in humidity. Ivy plants, crawling weeds, etc are the most noticeable. From the looks of your photos there isn’t anything unhealthy happening with the leaves.