Hi
. I don't know exactly what it is, but there are a few tricks to get it off of them better.
1. You can let them "sit out" for awhile and the packing will dry out and fall off.
2. Put them in water, they float, the packing sinks. They'll climb the edge of a cup fast though, when they get the slightest bit of water on them.
That's just what I do, though.
I've never had a problem with my two getting a little in their systems along with the PWs, but try to prevent it at all costs, because I honestly don't know how bad it is for them to ingest a lot.
Hope that helped some,
Abi