Hi Gerhard,
There are some reasons why your mouse is getting sticky. For example, the way you use your mouse, or the product you are using to clean your mouse. It is not necessary that any mouse will get sticky by itself. The best way to get this issue addressed is by going to the Microsoft Store where you bought your mouse. This way our technical personnel can check your device physically, explain to you what happened to your mouse and provide option on what to do or what you should do with your mouse. You can also contact our Global Support team for further assistance. Click here to get the number to dial. Let us know if you have other concerns, will be here to help.
Thanks.