Cleaning resin prints from your 3D printer has always been a challenging and complex topic. Many users have varying opinions and methods on what works best and what is safe. It’s essential to research and make an informed decision on the cleaning solution that suits your needs. Personally, I have been using sonic cleaners with isopropyl alcohol for years, and I find them to be incredibly effective.

While some may express concerns about using isopropyl alcohol in sonic cleaners, my experience has been positive. I have used three 2-liter sonic cleaners daily for many years without any safety issues, including spontaneous combustion. However, it is crucial to maintain good ventilation and use the lid on your sonic cleaner to mitigate air quality concerns. A popular method to enhance safety involves filling the sonic cleaner with water and placing the isopropyl alcohol and resin prints inside a Ziploc bag. This method isolates the isopropyl from the electronic components of the cleaner, offering a safer approach.

Dirty Bath: The first bath removes the bulk of the resin.

Medium Bath: The second bath helps break up any remaining residue.

Clean Bath: The final bath ensures the prints are perfectly clean with minimal cloudiness in the isopropyl.

If you’re using the Ziploc bag method, you can still achieve a thorough clean with one sonic cleaner by performing multiple baths in the same cleaner. Choosing the Right Sonic Cleaner

Isopropyl alcohol degrades plastic quickly, so it’s important to choose a sonic cleaner made of stainless steel with minimal plastic parts. Avoid cleaners with film buttons, as the isopropyl can damage these components over time. Instead, opt for cleaners with bulky knobs and, if possible, a timer with an audible bell. I’ve linked below the sonic cleaners I currently use. I own three 10-liter units, but a single 2-liter unit is sufficient for most hobbyists. Using the Ziploc bag method, you can still achieve a three-bath process for perfectly clean models every time.