OK Chris
I think we agree, that effective cleaning is essential and avoiding marking,or damaging , is pretty important
So, another option..........
I have a powerfull, industrial vacuum, with water filtration, which traps everything that it sucks up.
My machine has Hot Solvent capability which is great for Mattresses / Curtains / Rugs.......
If I can then treat these items, after cleaning with something that will kill any bugs which I might have missed and.........protect the items against spills and.........remain active for 12 months or more, to kill emerging bugs.
Oh, nearly forgot........advise my client about the importance of 'airing' the house, vacuuming the carpets, mattresses, drapes regularly and calling me out every six months for a maintenance clean.
Am I not giving a fabulous service which will promote heathier living and control the cause and the triggers which cause Asthma and Airborne Allergies, because this is what I do and have been doing for several years.
r m