I use a handle to pull most of the old wax out of my injectors. You
need to get a hold of the block of solidified wax so you can pull it
out. Metal chain you can get at a hardware store, with links around
1/2" works well. Use a piece around 12" long; shorter on a smaller
wax pot. With the top lid off your injector, lay a length of metal
pipe or rod or a wood dowel across the top, and drop both ends of the
chain into the liquid wax so the middle will lay over that rod. Now
turn it off, and let it solidify.
When solid and cold, turn the heat back on. Check it every few
minutes to catch it when just enough wax melts around the edges so
the large chunk of wax will pull free and lift out. Lift it out with
the chain that is stuck in the wax. You need to work it around any
points that stick into the pot like the temperature probe, or if the
nozzle outlet sticks in. Try to get as much out in one chunk as you
Once you have the big chunk of wax out, turn off the pot. As the wax
starts to cool, but is still soft, you can scrape the sides and
bottom with a plastic or wood spatula or stick (not metal - you
don’t want to scratch it up).
For the last little bits remaining, turn the pot back on to melt
again. Use a paper towel to remove the last of the wax, and all of
the garbage and dirt at the bottom. Then in goes your new wax.
I have not used Kerr carveable wax. I have used a blue carveable wax
we got from Rio Grande, and liked it quite well.