Welcome to the Nexus rbalzer!
What Cyb said, I'd avoid using soap though as this could also leave a residue. THe point of my reply is to add an additional note though,
Set the machine up ready to use but don't load it, heat it with a torch lighter then BLOW the crap out of it (with your finger stopping the wool from blowing out the end). This will ensure that any other contaminant particles that were there will be minimised. (Also, rinse the machine inside out thoroughly with only water -to remove any micro glass particles from the drilling)
Happy travels!
Nothing said on behalf of "DieM" is true