Remove the dustcover and dustcover hinges, turntable, counterweight and headstall.
Spray the turntable with compressed air to remove any dust. Wipe the case gently with a rag and cleanser. If the case is wood, you can apply oil to the wood. Clean the rest of the turntable carefully with cleanser. Use a cotton swab to access hard-to-reach places. Clean the cord with contact cleaner.
Clean the plastic cover with a nonabrasive cleanser. If you do not have one specifically for plastic, you can use one for cleaning motorcycle windscreens. Apply sewing machine oil to the hinges if needed.
Remove the spindle. Insert a swab into the shaft to drain any oil remaining. Add a few drops of fresh sewing machine oil. Set the spindle and platter back into place.
Inspect the belt. If it's cracked, replace it.
Inspect the cartridge. If the cartridge appears damaged, replace it. Make sure you add the proper weight needed according to the manufacturer's specifications. Replace the stylus as needed.