I like to place in recently boiled h2o this will kill any bacteria that may be in the med, and it will help with flow and absorption. Let it sit in the h2o for a few minutes. Works great for me, and I hit delts and quads and this seems to reduce the pain. You should always hit your delts is using Sus to max the time release structure of the compound since they are so dense.
I too use heated water to let the oil warm up and it seems to help speed flow immensely, not sure i agree with less pain at site as some said..