Silly Flower Pollen, Yellow Stain on Fingers.

So I was taking pics with flowers and I got some yellow pollen on Mayumi's fingers and now there is a yellow stain on her thumb. Got any idea how to get rid of it?
Where no dollieh is left behind.
https://w.dolliehsanctuary.com/sanctuary/
https://w.dolliehsanctuary.com/sanctuary/viewtopic.php?f=32&t=3524