What Solution Should You Use in an Ultrasonic Cleaner?

Researched by John Morris · September 11, 2026 · Research-based guidance

Choose an ultrasonic cleaning solution for the residue and the materials it will contact, then check that the machine permits it. The exact product sheet matters: two liquids intended for ultrasonic use can have very different material restrictions and operating directions.

1. Identify the residue

Dust, skin oils, workshop grease and tarnish are different problems. If a dark patch could be dirt, corrosion, an intentional finish or damage, identify it before selecting stronger chemistry.

Elma's range illustrates that separation. A4 is described for contaminants including grease, soot and polishing paste on specified materials, while Opto Clean addresses optical applications. These are examples of different formulations, rather than substitutes for one another.

2. Check all exposed materials

Account for plating, paint, rubber, adhesives and secondary metals, not just the main component. Grant notes the susceptibility of aluminum and other soft metals to pitting. Obtain guidance for the complete object and its surface condition.

Elma's EC110 instructions exclude aluminum, magnesium and their alloys, along with plastics susceptible to stress cracking. Other formulations in its range have different compatibility. The label alkaline alone is therefore insufficient to choose a product.

Read the safety data sheet and the machine restrictions. An aqueous cleaner can still require protective handling and be unsuitable for a particular tank or item. Keep household and workshop preparation separate so residue from one job does not carry into the next.

3. Measure the instructed mixture

Use the exact formulation's concentration, water, temperature and exposure directions. Calculate from the required working mixture, not automatically from the machine's advertised capacity.

Check the meaning of a percentage or ratio before measuring. Concentrate as a share of the final solution is different from adding it to an already-full tank. Follow the specified mixing order; ask the supplier about ambiguous notation rather than making up a conversion.

Do not combine cleaning products to strengthen the bath. The water and dish-soap guides address those narrower choices without providing a universal recipe.

4. Complete the rinse and drying steps

Cleaning, rinsing and drying are separate operations. EC110's directions, for example, require a thorough water rinse followed by drying. Follow the liquid and object's actual instructions, including handling and disposal requirements for the used bath.

Keep flammable liquids out of an ordinary tank

Magnasonic excludes flammable liquids such as alcohol. Do not substitute alcohol, gasoline or another flammable solvent in an ordinary aqueous cleaner, or use a jar to bypass the restriction. Select a different approved method if the job cannot be performed with a liquid the equipment permits.

Homemade mixtures and substitutes

There is no universal homemade mixture we recommend. Plain water is a documented starting point for some household models; Magnasonic also permits mild dish detergent for oily deposits in its MGUC500 guidance. Those options are more specific than treating any household cleaning liquid as a substitute for ultrasonic concentrate.

For jewelry, choose a liquid permitted for the stones, settings and machine. For a workshop part, match the formula to its alloy and contamination. If a process specifies a particular formulated cleaner, replacing it with an improvised mixture changes that process. Use its published dilution rather than combining ingredients from unrelated recipes.

Can I put white vinegar in my ultrasonic cleaner?

Do not treat kitchen vinegar as an automatically approved substitute. The manufacturer guidance reviewed here does not establish a vinegar recipe for your machine and object. Permission to use mild dish detergent does not imply permission to use vinegar. Check an explicit machine-and-material instruction before using an acidic cleaner, and do not mix it with other cleaning products.

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