What’s the Best Clock Cleaning Solution for Mechanical Movements?

Clock Cleaning Solution

When it comes to preserving a mechanical clock’s precision and lifespan, cleaning plays a vital role. Clock owners and horologists alike often ask: What is the best solution for cleaning clock movements and parts? At Clockworks, Inc., we’ve tested nearly every method available over the years. Whether you’re maintaining a vintage heirloom or servicing a newer movement, the right cleaning solution makes all the difference.

In this article, we’ll explain what makes a cleaning solution effective, what to avoid, and how to clean your clock parts the right way.

Why Does Clock Cleaning Matter So Much?

Clocks, especially mechanical ones, are intricate machines. Dust, dried oil, and air pollutants can gum up the works, slowing down performance or stopping the movement altogether. Even worse, improper cleaning can cause long-term damage to pivots, bushings, and gears.

Routine maintenance every 3 to 5 years—including a thorough cleaning—ensures accuracy and longevity. The key is choosing a clock-safe solution that removes debris without harming the finish or metal.

What Makes a Good Clock Cleaning Solution?

A high-quality clock cleaning solution must:

• Break down and dissolve old oil, grease, and grime
• Be safe for brass, steel, and plated parts
• Leave no residue behind
• Work well with ultrasonic or manual cleaning methods
• Dry quickly to avoid corrosion
• Avoid harsh acids or abrasives that damage parts

Many household cleaners fail on one or more of these fronts. That’s why horology-specific cleaning solutions are essential.

What Cleaning Solutions Do Professionals Use?

Clock repair professionals typically rely on solutions developed for horological use. At Clockworks, we use and recommend the following categories of cleaners:

1. Ammoniated Clock Cleaning Solutions

These contain ammonia, which helps break down hardened oils and grime. They work well on brass and steel but should not be used on lacquered parts, as ammonia can damage finishes.

Ammoniated cleaners work best with ultrasonic tanks or agitation tanks. They provide fast, deep cleaning and are the preferred choice for heavily soiled clocks.

2. Non-Ammoniated Solutions

Safer for plated, painted, or delicate parts. These offer a gentler cleaning process but still effectively remove dirt and oil. We recommend these for clocks with sensitive finishes or when working in a space with poor ventilation.

3. Rinse Solutions

After cleaning, every clock part must be rinsed thoroughly to prevent chemical buildup. Rinse solutions displace water and neutralize any residual chemicals. They often contain corrosion inhibitors, which protect metal parts during drying.

For best results, use a matching rinse solution from the same manufacturer as your cleaner.

Can You Use Ultrasonic Cleaners?

Yes—ultrasonic tanks are highly effective when paired with the right solution. The high-frequency vibrations agitate the cleaning solution, allowing it to reach even the smallest crevices. However, you must always disassemble the movement completely before placing parts into an ultrasonic cleaner. Never submerge an assembled movement or one with plastic, wood, or glued parts.

Always follow these guidelines:

• Use only metal parts in the ultrasonic tank
• Keep the temperature below 120°F to avoid damaging lacquer
• Rinse immediately after ultrasonic cleaning
• Let parts air dry fully or use a warm air blower

What Should You Avoid?

Avoid any of the following:

• Household degreasers – Often contain water or acids that corrode metal
• Soaps or dishwashing liquids – Leave residue and require excessive rinsing
• Vinegar or alcohol – Too harsh for plated and lacquered parts
• WD-40 or other lubricants – Attract dirt and break down over time

These may seem convenient but can do more harm than good. Clock parts need precision and chemical compatibility.

How Often Should You Clean a Clock?

We recommend a full cleaning every 3 to 5 years for clocks in regular use. If the movement stops working, chimes become sluggish, or timekeeping is inconsistent, cleaning may be overdue.

If you’re unsure of the last service date, or if you see black sludge around the pivots or gears, it’s time.

Can You Clean a Clock Without Taking It Apart?

No. We don’t advise it. Spray-and-go products and shortcut methods might give temporary results, but they won’t remove the buildup inside the gears and bushings. Worse, they can push debris deeper into the movement. Proper cleaning always requires full disassembly.

If you’re not comfortable taking apart your movement, our repair team at Clockworks can handle it for you.

Final Thoughts: Choose the Right Solution, Not the Fast One

Clock cleaning isn’t about speed—it’s about preservation. Choosing the best clock cleaning solution means choosing safety, performance, and longevity. Always match the cleaning method to the movement’s age, condition, and materials. Use professional products, clean with care, and when in doubt, contact an expert. If you have any questions about which cleaner is right for your clock, reach out to us at Clockworks, Inc. You can email us at clockworks@clockworks.com or visit Clockworks.com to explore our full selection of cleaning supplies and repair services.

Updated on: 06/10/2025