Both above possible , I start with intensive cleaner a lighter cleaner( light alkaline)
With any floor I think it is important to resolve the full removal of any form of wax on one unlaid tile before laying the floor to confirm it will lift.
I would check with supplier if removing this before grouting on the main floor, as this layer may aid the grout release .any pre cleaning may also remove a pre/nano seal as well as a transit or fabrication wax ( more generally on polished, satin finishes)