Remove small plug on swivel and use silicone spray turning the antenna a few times while spraying. Don't use too much or it will run onto roof. Remove top plug/plastic nut and spray the worm gear. Use a liberal amount. This will work its way down to the o ring that seals the shaft. You can also remove the shaft by taking out the pins and inside handle and dial. The shaft can then be removed from the top. IMO that is not necessary and the spray will work down to the rubber o ring. Use silicone on the gears as well accessible from up top. Just give them a few shots. That's it.