The insulator is machined to slide on and off the heat break bushing with ease, so you should not have to apply force to the insulator during the process. A light touch is all it takes! However, as there are occasionally slight variations in diameter, you may find that the insulator does not slide as easily as we describe. In this case, we recommend gently rotating the insulator as you guide it down to meet the bushing of the heat break.
You should not use any tools in an attempt to install or remove the insulator. If you are in a situation where you believe tools are necessary, please reach out to Slice support before doing so to be sure we do not have an alternate solution.