in reply to Norman. When we were contracting, I had a chemical specialy formulated which is isopropanol based blue in colour and fragranced which is great for colour coding as this product should only be used in general areas (BLUE). the Iso in the formulationhas a low flash point and therefore there is less streaking when cleaning windows (any Glass) laminated tables (not wood) and most surfaces including stainless steel. We still sell it to local contractors as it only works out around 25p per 750 ml it comes in 6x1ltr bottles which you would dilute following the instructions.(£18 6x1ltr)
The key to using a product such as this is to use clean microfibre cloths which are not contaminated with other chemicals. This is often the cause of smelly cloths. We also have another same quantities and dilution rates, this is red for high risk areas such as toilets and is highly fragranced.
One of the largest contractors in the world uses a product simmilar to this for obvious reasons, its cheap, its effective and its is easy to train staff on colour coding.