The way I was told. Buy a baby booger sucker, cut the tip off, buy some everclear or other 190 proofish alcohol, install atty thread outside of booger sucker, put in cup of everclear, squeeze 5 or so times, allow to dry, prime and use. Was told everclear since it has no impurity's that can cause residue like isopropyl alcohol. I found this works very well since the alcohol evaporates in 20 or so minutes and doesn't leave a nasty taste behind.