Those little water misters look good! I always thought those were bigger machines.
Strangly enough those little ones are not on Dutch Ebay (only the UK seller).
I found a small one on Conrad
but with awful LED;s and described as to use for indoor (humidity control and aroma????).
I'll make a visit to a garden centre next week to see if they have those little ones.
Using water is off course also better than using chemicals.
But will they also function beneath 0 degrees Celcius? Not that I had to worry about that in a winter like this...