Is this Plasticizer leakage?

[Icicle]

My husband got me a Party Time for my birthday, she had some issues via the auction but I was totally cool with them.

When I got her today she was a bit hard so I figured it was plasticizer leaking, even though she wasn't terribly sticky on the outside. And seeing some shadows inside of her I got a bit concerned that maybe something was missed by the seller (or by me in the description or pictures), so I popped her head off (previously pretty stuck on) and noticed she was SHINY inside... against my better judgement I stuck a finger inside and what looked/felt like glue came up (...it took like three 'washes' in some cooking oil before the stickiness came off my finger). Is this plasticizer leeching on the inside? I mean it smelled vaguely plastic-y, and her being a bit hard would certainly lead to it being that.. just want to be safe. Don't want it to be like something super serious and dangerous, after all!

And further.. is it smart to clean her out (and if so, with what?) or is it just safe to leave her be for now?

[Baby Sugarberry]

Sounds like plasticizer leakage, unless Party Time was washed with some kind of chemicals that got left behind - either way, it'd be best to get that all off and fully dry out inside before reassembly.   Basic dish soap will take care of it, at least temporarily - it may come back until all the plasticizer is gone. 

[Icicle]

I figured as much. I didn't think it was from a cleaning because her head was factory sealed on. But okay I'll have to wait because I need to get to the store for dish soap anyway, but so long as that's likely what it is it eases my mind a bit.