Often I repair pickups without submerging the whole pickup in wax. I like keeping the top and bottom of the pickup vintage looking. I like keeping the dust and dirt on the pickup from many years of playing. I mask the top and bottom of the pickup to keep it free of excessive wax residue. I scrape bits of clear wax onto the loose area of the coil. I use a voltage regulator to lower the temperature of my soldering iron. I get the tip temperature to about 180-200°F (enough to melt the wax without melting the insulation) and carefully melt the wax into the coil. This generally keeps the outer windings secure to eliminate snags if and when putting covers on the pickup. Note: Soldering irons can get very hot and extreme caution must be used and wear safety glasses.