1969 S Lincoln Memorial Penny

Please show us close-ups of the date.

Given the posted pics, I'm not seeing a DDO. Better images may help.

Still looks normal in this pic.

Looks normal to me, but if it was a DDO - you just ruined it by scrubbing it with a toothbrush and cleaning chemicals.

with Dearborn.

It's never a good idea to do any kind of friction cleaning to a coin. While the toothbrush may not be enough to scratch a copper cent, the contaminates that are freed by scrubbing can act like sand on the surface. Collectors will pay much more for coins showing the original surfaces. Even a wipe with a soft rag can cause hairline scratches that will cut the value of a coin. Cleaning can reduce the value of a coin by 80% or more. No one like getting a coin that was submitted for certification back from the TPG in an 'Ungradable' body bag;

The only acceptable way to 'treat' a dirty coin at home is to soak it in acetone to remove debris on the surface. This will not damage the coin and isn't considered cleaning by the Third-Party Grading companies. Once you have soaked the coin in acetone. rinse it with distilled water and let it dry. Make sure to read and understand the instruction on the label, as acetone is flammable and can be explosive.

You can send a coin to be professionally conserved if it turns out to be valuable, but wait for confirmation of what you have before doing anything.

It does not matter what you use to clean a coin,unless you really know what you are doing...just don't do it.
John1

I agree...not seeing any DDO...just a spender...oops...just a copper saver!!!

KK