When I want a salty tube I add about a quarter teaspoon of salt in a Pyrex cup,with four onces of raw plastic.I stir it in well with a craft stick,place in microwave,and leave the stick in the cup while it is being brought up to tempeture,this stick stays with the plastic in the pouring pan,to help stir and,and act as a heat sink.This works very well while dipping.I always try to keep the dipping plastic,and salt,stired during each dip,by placing the rod into the plastic,and moving the rod sideways thru the width of the pan.The salt even then sometimes settles to the bottom.At the last of the plastic,when,I tilt the pan,to use the last bit of plastic,the salt will concentrate,making a very salty,weak,tube.I like these precious few,but they usually get one fish and are destroyed,like a senko.