Same as most of the above; I toss washers that are rusty, and leave non-rusty ones where they belong. I know I'm not about to dunk any of my collection into water and our house never gets excessively humid, so they're pretty safe.
The only times I've ever removed washers was with ponies with tail rust, and I would prefer to not keep anything rusty around, so I discard them as I'm cleaning the rust, since there's really nothing you can do to fix a washer after it's rusted.
Clean washers remain inside the pony.
I do the same as many other people who have replied: rusty washers are thrown and replaced with cable ties. OK washers are kept on the tail where they should be. And if a pony's neck seam is still intact and she shows no sign of rust I do not open her up just to have a look.
As an interesting side note I have one pony who's neck seam was sealed when I received her but who rattled, so I opened her up thinking that her washer was rusty. But it wasn't. They had just thrown it into the pony instead of attaching it to her tail as they should have. So I have left it like that as a memory. Crazy Hasbro people.
I only toss em if they're rusty.
I do the same as many other people who have replied: rusty washers are thrown and replaced with cable ties. OK washers are kept on the tail where they should be. And if a pony's neck seam is still intact and she shows no sign of rust I do not open her up just to have a look.
As an interesting side note I have one pony who's neck seam was sealed when I received her but who rattled, so I opened her up thinking that her washer was rusty. But it wasn't. They had just thrown it into the pony instead of attaching it to her tail as they should have. So I have left it like that as a memory. Crazy Hasbro people.
I've seen this where the pony's tail was forcefully pulled out through the tail hole. So many ponies were carried by their tails by children, and if the tail becomes uneven, it can pull through the washer. I've had many a tail-less pony with an intact neck seal.
I keep mine, but I also don't remove them unless they are rusty or have fallen out. I de-rust them & put them in ziplock bags.Thanks! That's interesting.
Your Forget-Me-Not's washer has probably just oxidized. Some metals like steel change colors depending on how hot they are heated.