99% isopropyl is preferable, but any percentage above 70% will sufficiently clean your pipe. A higher percentage will clean your pipe more efficiently.
If you want to evaporate the alcohol and smoke the resin later, don’t add salt. Perform the same steps and make sure the alcohol is completely evaporated before smoking the leftover resin.
Be careful with the resin–it’ll be extremely sticky and will stain anything it comes in contact with. Make sure to rinse away all of the alcohol, since it is extremely flammable.
Soak your pipe in isopropyl alcohol for five minutes every week to keep it clean. [5] X Research source If you have a wood pipe, do not soak it weekly. Rather, scrub the pipe with an isopropyl alcohol-soaked toothbrush to remove buildup.
Don’t leave your pipe in the freezer longer than thirty minutes. Some cheaper glass pipes could break when exposed to extreme cold. Set an alarm so you don’t forget about your pipe in the freezer.
If you have a glass pipe, place the pipe in the pot before you start to heat the water. Don’t use this method on a wooden pipe. It may damage and discolor the wood.
Depending on how much buildup your pipe has, this process may take longer.
Once the resin is sticky and no longer damp to the touch, you can smoke it. [11] X Research source
Pull out the resin and let it dry if you want to smoke it later. If not, discard it.
