I hate that horrible rubbery plastic coating, that they sometimes put on small electronic devices, that turns sticky after a year or three . If I want to keep using the device, I have to remove the coating which has turned sticky, which is a major undertaking.
To clean the rubbery coating I need to use eucalyptus oil, ti tree oil, citrus oil, alcohol, propyl alcohol or a mixture of one or two of them and some old cloth. The process is messy and time consuming.
Just stop it.