snowhite

hello, has anyone tried using the parquet wax by Kiwi? Wonder if it's good. For Sofix, if just pour and spread over parquet to clean, wouldn't it use up very fast? My living room tiles and grout have patches of grey stains after reno which I have no idea what it is. I've tried using Cif, green pad and large amount of force but the stain is still there. Any good recommendations to remove the stain? Thank you!