White spirits might leave a residue, due to it's make up, so many discourage using it. If rubbing alcohol isn't available, try finding some electronic contact cleaner. If you can find that, and only in spray form, spray a goodly amount into the can's cap or some other small thimble-like item until you get enough to dip a cotton swab in and use that to clean the paste. Be sure to allow the cleaned surface plenty of time to dry prior to reapplying the paste.