The printed work has a sticky, wet surface, and the color falls off when gently wiped with a tissue.
https://support.eufymake.com/s/article/Ink-is-not-fully-dry-cured-after-printing
Print a test pattern or color patches, then gently wipe the printed area with a tissue to check for adhesion failure or color detachment.
If the cleaning solution or moisturizing solution was not fully drained, perform a Deep Clean, then print the test pattern again to verify whether the issue has been resolved.
If Deep Clean does not resolve the issue, perform a factory reset and refill the ink, re-test printing