For glass water pipe enthusiasts, owning a personalized glass bong is a truly delightful experience. If you haven’t tried one yet, I dare say it might become your favorite tool for consuming cannabis!
However, during use, I often find the downstem firmly stuck in the base. I believe many fellow enthusiasts encounter this issue as well. So, let’s delve into the details of how to get a stuck downstem out of a glass bong in this blog post.
What Causes the Downstem to Get Stuck?
Before we address the solution, it’s important to understand why down stems get stuck in the first place. While I’m not familiar with the intricate principles behind this, I do know that a major reason is resin buildup—the sticky residue that accumulates during our daily use. Over time, this resin essentially “glues” the downstem to the joint, making it difficult to remove. Of course, the following situations may also lead to this situation
Temperature Fluctuations: Glass has unique properties that cause it to expand and contract with temperature changes. Drastic temperature shifts can cause the downstem to expand excessively and become stuck.
Improper Handling and Wear: While glass is durable, it’s prone to minor scratches and surface irregularities. Over time, these tiny imperfections can cause the downstem to have difficulty sliding or rotating smoothly, eventually leading to it becoming stuck.
Thermal Expansion and Contraction Method
This method takes advantage of glass’s sensitivity to temperature changes.
Step 1: Immerse the joint of the water pipe in hot water (not boiling) for a few minutes. The heat will cause the surrounding glass to expand slightly.
Step 2: Quickly submerge the downstem in cold water or wrap it with ice cubes. The difference between the contraction of the downstem and the expansion of the water pipe should create enough loosening to release it.
Step 3: Gently rotate the downstem while pulling upwards. Avoid applying excessive force.

Using Lubricants

Step 1: Apply a small amount of food-grade lubricant to the joint between the downstem and the water pipe. Vegetable oil, coconut oil, or even petroleum jelly are good options.
When purchasing, choose reputable brands (such as Nutiva coconut oil from the USA). Interestingly, I recently discovered it can also serve as a natural moisturizer to protect my sensitive skin.
Step 2: Allow the lubricant to penetrate the joint for at least a few minutes. Don’t try to do anything prematurely, as this will definitely produce undesirable results.
Step 3: Slowly rotate the downstem while applying even upward pressure.
Precise Tapping

Careful tapping can help break up residue or create tiny gaps that cause the downstem to stick.
Step 1: Use a wooden spoon, rubber mallet, or any blunt object.
Step 2: Gently tap around the water pipe joint near the downstem in a circular motion.
The most important purpose of doing this is to gradually loosen the downstem while tapping, allowing me to slowly attempt rotating it.
Cleaning Solution Soak Method
Professional glass water pipe cleaners are specifically designed to break down stubborn residues that cause downstems to get stuck.
When choosing a glass water pipe cleaner, I tend to recommend brands like Formula 420 or Grunge Off, which are specially designed for cleaning water pipes and other smoking devices.
Isopropyl alcohol solution: You can also opt for 91% or 99% isopropyl alcohol, which effectively dissolves resin and other residues.
Vinegar and salt mixture: If you don’t have the above cleaners, you can use a mixture of vinegar and salt. This is a milder household alternative, although it may require a longer soaking time. It’s the method I use most often in my daily routine.
Step 1: Place the water pipe in a container so that the downstem is completely submerged in the cleaning solution.
Step 2: Allow it to soak overnight or as recommended by the cleaner manufacturer.
Step 3: After soaking, try to rotate and remove the downstem. If there’s still resistance, repeat the soaking process.
However, I usually recommend using the lubricant method. Since these bongs are made of glass, we can maximize the prevention of cracks in the bong compared to the thermal expansion and contraction method.