The best way to clean Littmann stethoscope tubing is with a cloth or wipe dampened with 70% isopropyl alcohol. You can also use mild soap and water or a 2% bleach solution, though bleach may discolor the tubing over time. The key rule: wipe it down, but never submerge it.
Approved Cleaning Solutions
3M recommends three cleaning options for all Littmann stethoscope models:
- 70% isopropyl alcohol — the most practical everyday choice. Pre-packaged alcohol wipes work perfectly. This concentration falls within the 60% to 90% range that the CDC identifies as optimal for killing bacteria on surfaces.
- Mild soap and water — effective for general grime and skin oils. Dampen a soft cloth with soapy water, wipe the tubing down, then dry it thoroughly.
- 2% bleach solution — provides stronger disinfection but can cause tubing discoloration, especially on colored or black tubing. Use this sparingly and only when you need a deeper clean.
Whichever solution you choose, apply it to a cloth or wipe first. Run the damp cloth along the full length of the tubing, then dry everything completely before using or storing the stethoscope.
How to Clean Step by Step
Grab an alcohol wipe or dampen a soft, lint-free cloth with your chosen cleaning solution. Start at the earpieces and wipe down each tube toward the chestpiece, applying gentle pressure to pick up oils and residue. Flip to a clean section of the cloth and repeat if the tubing is visibly dirty. Wipe the chestpiece and bell the same way, covering the entire metal and plastic surface.
Once you’ve wiped everything down, go over it with a dry cloth. Moisture left sitting on the tubing or trapped in the crevices around the chestpiece can degrade materials over time. Make sure all surfaces are fully dry before you put the stethoscope away or drape it around your neck.
Cleaning the Removable Parts
The ear tips, tunable diaphragms, and non-chill bell sleeves on Littmann stethoscopes are all designed to snap off for separate cleaning. Pull the ear tips straight off the metal eartubes, and gently pry the diaphragm away from the chestpiece rim. Clean each piece individually with 70% isopropyl alcohol or mild soapy water, making sure to get into any grooves where earwax, skin cells, or debris accumulate.
Let every piece air dry completely before snapping them back into place. Reassembling while parts are still damp can trap moisture inside the acoustic pathway, which may muffle sound quality.
What Not to Use
Hand sanitizer is the most common mistake. It seems logical since it’s alcohol-based, but 3M explicitly warns against it. Hand sanitizers contain moisturizers, fragrances, and other additives that can break down the tubing material over time, leaving it sticky, stiff, or discolored.
Other things to avoid:
- Submerging in any liquid. Never soak or rinse your Littmann under running water. Liquid can seep into the acoustic seals inside the chestpiece and compromise sound transmission.
- Autoclave or sterilization. The heat and pressure of sterilization processes will warp and destroy the tubing and plastic components.
- Harsh solvents. Acetone, undiluted bleach, and industrial disinfectants can crack or dissolve the tubing material.
How Often to Clean
The CDC classifies stethoscopes as “noncritical” medical equipment that can carry infectious agents and contribute to healthcare-associated infections. While no universal rule specifies an exact frequency, the practical standard in clinical settings is to wipe down the chestpiece and tubing between patients. If you’re using your stethoscope in a hospital or clinic, a quick alcohol wipe after each patient contact takes about 10 seconds and significantly reduces cross-contamination risk.
For students or professionals who use their stethoscope less frequently, cleaning it at the end of each shift or study session is a reasonable baseline. If the tubing feels sticky or looks dull, that’s a sign skin oils and residue have built up and it’s overdue for a wipe-down.
Keeping the Tubing in Good Shape Long Term
Stethoscope tubing gradually stiffens and cracks with age, and a few habits speed that process up. Skin oils are the biggest everyday culprit. When you drape a stethoscope around your bare neck, oils and sweat transfer to the tubing and slowly degrade it. Wearing it over a collar or storing it in a case when not in use limits that contact.
Prolonged and repeated exposure to alcohol can also harden rubber and certain plastics over time, according to CDC documentation on chemical disinfectants. This doesn’t mean you should skip alcohol-based cleaning. It means you should wipe the tubing dry after each cleaning rather than letting alcohol sit on the surface. A quick, thorough wipe-and-dry routine gives you the disinfection benefit without excessive chemical exposure.
Extreme temperatures also take a toll. Leaving your stethoscope in a hot car or on a cold windowsill accelerates tubing breakdown. Store it at room temperature, ideally in a protective case or pouch, and keep it away from direct sunlight when possible.