I had the same problem with my Mk 4 dash panels with sticky stuff on them.
Tried various solvents and by chance I had a small bottle of "Dettol Healthy Touch Instant Hand Sanitizer" in the car and gave it a try - it worked and so far no ill effects (did most of the panels almost a year ago)
I used a small hand towel - apply some sanitizer to a small part and rub and rub - it does take a bit of effort - as the sticky stuff comes off on the towel use some more sanitizer on a clean part of the towel until you have removed all the sticky stuff.
As usual do at your own risk - if in doubt try the sanitizer on a small area to confirm no ill effects.