How to clean schleich figures?

BaileyisDarcy
This is a bit of a weird question but the only google result took me to a forum where it was discussed but nothing conclusive could be found.
The most definite answer was that newer schleich figures can be cleaned with all sorts of things but mine are 2004 and older.

I have an '04 unicorn mare
An '04 shetland pony mare
An '03 miniature horse gelding
An '03 draft horse mare
And an '02 draft horse foal

The miniature has some kind of sticky residue on it and the others are simply suffering typical wear and tear from being around since i was 7 years old at least.

Thats 13 years of wear and tear... Theyre actually looking pretty good now that im doing the math XD considering they spent a considerable amount of time in the school sandpit haha

Anyone know how best to clean them? Im going to start collecting schleich figures when i can afford it and since ill be aiming at retired figures im likely to find a sizeable amount that need cleaning too.
How to clean schleich figures?
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