Salamander tank humidity

[lotty]

I have my tank with salamander S.s. Terrestris in. There are 4 of them. There is plenty of mosses, logs with moss on, plants and a water bowl. I placed a humidity / temperature thing in there that has been in the fridge for the past 3 years to check the fridge temp. I spray the sals tank with filtered water every other day but the humidity level always reads 99%. I dont think it is 99% as the tank is not that wet all the time. Either the humidity thing is broke or there is spray water in it.

It started off at 35% humidity. What would the tank need to be to be good. Thanks.

Temp drops to around 15 - 16c through the night and goes to room temp in the day around 19c.

 

[Mark]

Is your gadget measuring relative humidity, i.e. relative to the temperature? Average UK relative humidity levels are usually between 70 - 90% outdoors. If you’re spraying regularly a figure of 99% relative humidity could be achieved. Take the monitor out and place it somewhere less humid for a while to see if it’s measuring correctly.

What’s the ventilation like on their tank? High humidity and poor ventilation is going to make an unhealthy environment for your salamanders.

 

[lotty]

The tank lid is a plastic one, not tight fitting, and quite loose. There are gaps around the lid and where the cabled etc go through when used as a fish tank.
The humidity gauge is one of them plastic ones with temp built in. I have removed it and placed it near a radiator to 'dry' it out incase there is water in it from spraying.
I dont know if having the temp gauge in the fridge for about 3 years has ruined it. Or even if the battery is any good in it now as I have never changed it.