This tip is from Bryan Kelly. Put a couple of inches of water
in utility tub with Dawn detergent. Soak the coils in the tub
and use your fingers and a toothbrush to clean any hard to remove
grime. This usually only takes fifteen minutes or so. Make sure
to dry the coils extremely well before you hook them back up.
Water and high voltage are not good together.
NOTE: This DOES NOT work with Stern coils. Stern coils appear
to use a water based adhesive for the coil covers. You can soak
the coils but the wrappers will come off. If you are quick you
can dip a Stern coil in the soapy water and use a wash cloth
to quickly clean it. Make sure you dry it quickly and if the
paper comes loose you can re-wrap it and it should stick.