I typically have a Mason jar filled with isopropyl alcohol in my bathroom so that I can dip the head of my safety razor in it after every shave. (primandprep.com)
Simply mix a small amount of mica with isopropyl alcohol in a dish to desired consistency to create your soap paints. (soapdelinews.com)
You can also dry out the tubing by running for two minutes (as above) or pouring a small amount of isopropyl alcohol into the tubing. (expressing-mama.com)