Inquire about their cleaning techniques: warm water extraction for carpets

https://wiki-room.win/index.php/Tile_and_Carpet_Cleaning_Services_Checklist:_From_Grout_Cleaning_to_Deep_Steam_in_St_George_38561

Inquire about their cleaning approaches: warm water extraction for carpets and proper grout-safe techniques for tile to avoid damage and residue.