Inquire about their cleaning techniques: hot water extraction for carpets
https://mega-wiki.win/index.php/What_to_Look_For_in_St_George_Carpet_Cleaning_Services:_A_Homeowner%E2%80%99s_Guide_80036
Inquire about their cleaning methods: warm water extraction for carpets and correct grout-safe strategies for tile to prevent damage and residue.