How we decide
Three answers
Yes: the sources agree that it is fine, if you follow the how-to.
Check first: it depends on something we cannot see from here, such as a coating, a glued stone or a crack.
No: the sources warn against it, or the risk of damage is real.
When the sources disagree or say nothing clear, we choose Check first over Yes. A wrong No costs you a few minutes of cleaning by hand. A wrong Yes can cost you the item.
Follow-up questions
Some answers come with a few questions, such as whether a stone is glued. Each choice has its own verdict, and the most cautious one wins.
Where the answers come from
Every answer lists its sources so that you can check them yourself. Most are gemological institutes, makers' care instructions and manuals. The database holds 232 sources for 177 items.
Facts about cleaners
Tank size, heater, frequency and timer come from the manual, the maker or the seller. If we could not find a fact in a source, the field says "Not stated". We never fill in a likely value.
Power and frequency are the makers' own figures. We have not measured them. Each cleaner page shows the date it was last checked.
For your cleaner
When you pick your cleaner, the answer adds what its tank, heater and timer mean for the item, and the warnings in its manual. The verdict itself still comes from the same data.
Photo check
The photo check uses AI only to work out what is in the picture. The verdict still comes from the database. If the item is not in the database, the result is marked "AI assessment, not verified" and it never says Yes.
Product suggestions
Products are ranked by fit, never by commission, and money never changes an answer.
What we have not done
We have not tested the cleaners or the items ourselves. UltraOkay collects and compares what makers, manuals and trade bodies say.
An answer is guidance, not a guarantee. You clean at your own risk. For valuable or sentimental pieces, a jeweler, optician or dentist is the safer choice.
Corrections
If you see a mistake, tell us the item or the cleaner and, if you can, a source. We fix the data and the answer updates everywhere. Write to hello@ultraokay.com.