According to Edwin Pawlowski :

"Chris Lewis" wrote in message

Most baseboard heaters are quite easy to disassemble. You want
to get the heater core and thermostat unit out. Stuff a plastic
shopping bag in the "electrical boxes" to shield the inside (wire
ends, screw holes, box clamps), and spray.

But with some baseboard heaters, water leaks out when you remove the core.

Oh, yup. I forgot about _those_ ;-) But it sounded as if the OP was
refering to electrical baseboards. If your electrical ones leak water,
you have a _serious_ problem ;-)
--
Chris Lewis,

Age and Treachery will Triumph over Youth and Skill
It's not just anyone who gets a Starship Cruiser class named after them.