Apologies for putting a dampener on the discussions, but I have noticed that many of you are using domestic cleaning agents to provide commercial cleaning services, such as Viakal, vim, cilitBang and Wilko own label, I was always taught "Safety First" whilst it may be cheap now it may end up costing you more in the long run, as occupational health legislation requires you (as the business owner ) provide your workforce with adequate training, health and safety literature, including COSHH assessments, method statements and risk assessments for all works undertaken. It may seem like a minor point but the best way to prevent an accident is to prepare, the last thing you want is environmental health on your back following an incident or worse still cause injury to your employees or customers.
New legislation has been passed introducing commercial manslaughter and a crime punishable by imprisonment for the business owner / operators, you have a duty of care
If you need cleaning chemicals always buy from a reputable source, they should offer MSDS sheets, often they will provide training or dilution advise, as with all chemicals follow the manufacturers instructions and always brief the users before application.
Best regards, Geoff