I have a glass topped Soehnle kitchen scale. It was exposed to dampness and the glass plate has come loose. How is the glass plate affixed and is it repairable?

There is nothing in the very basic manual

https://www.manua.ls/soehnle/venezia-65080/manual?p=2

But 'Out 2' points to condensation on the control board or buttons that need cleaning as mentioned here. Note though, it has a 5 year warranty.
https://www.ifixit.com/Answers/View/371285/The+LCD+screen+keeps+showing+OUT2+error+code

..

TIME TO REPLACE IT WITH NEW

flip the switch, if you have a calculator here's the formula how many oz. x .0283495231

suspect thats the battery - change it and see

mcdevito75 here, You can try to disconnect the battery, then step on the scale then step off, Now re-install the battery and see how it works. If same contact scale manufacturer.

mcdevito75 here, There should be a button or knob close to the scale indicator you can press or turn to return the scale indicator to zero.

Hi,

If it’s a range, there is usually a couple of screws that hold the front of the top down, remove the screws, lift the front of the top and pull it out from the back hinges. Install the new top, make sure there are no loose wiring.
If it’s a cook top then make sure that the power to the cook top has been turned off, open the cabinet and look up. There should be a couple of brackets that secure the cook top. Remove the brackets, carefully lift the top and set it on the counter top (put a towel on the counter top first). replace the glass top (make sure there is no loose or exposed wiring), set the cook top back in the counter, secure it with brackets as was before, and double check your work.

Thanks for contacting fixya.com

http://www.fixya.com/support/r4964670-get_manual_most_any_electronic_device

I have looked and maybe you have the model number wrong the scale you are talking about 63700 Calando Quattrotronic scale is a simple digital scale and does not provide bmi, and hydration.
here is a link to the manual, http://www.leifheitusa.com/manual/63700.pdfit is in several languages including english as the company is european and sells to many countries. If you look english is there it is a very simple manual as the scale is only desinged to weight in either lbs or kgs nothing more. Sorry. If you would like a bmi chart you can get that here http://www.healthdiscovery.net/links/calculators/body_massindex_chart.htm and figure out your bmi based on height and weight in the chart.

I had some luck removing food and other stains with the new Vielda Glass Ceramic Scrung (its a sponge)

"
"Special scour sponge for cleaning glass ceramic cook tops without scratching. Eliminates burnt-in stains and greasy dirt film. Removes grease and loose dirt particles. Microfibre side will create a streak free finish."

I found mine at Walmart. It was a little pricey but if you just use the sponge for the stovetop then it will last a very long time.

Hope this helps.