Ink reverse move

I want to ask. Does anyone have experience with ink reverse move to cartridge?
I was cleaning the printer P400 with “Piezoflush” and my “Gloss Optimizer” is a pink now.
I’m afraid that “piezoflush” could get into all the inks.
If it happened how much it can affect printing?

Thank you for answer and your experiences.

If you don’t q-tip the flush off the ink stems than yes it can backfill the cart a bit.