What, when, why and how was spilled on the shelve or maybe the gummy glue from shelving paper dissolved and absorbed into the plastic. ? You need to find a solution that doesn't etch or loosen the plastic but will emulsify the sticky stuff.
Also, today's polymer vinyl is, like, impossible to penetrant and actually stick into, meld or weld together like model plastic or PVC pipes glues.
I mean, most shelves today are a vinyl so, I presume yours is. However if a hard plastic then you gotta be careful to figure out what sticky stuff is.
I've been hunting for years to find anything that can stick on or etch, bond, plant roots into a poly vinyl like you're describing.