Do none of you know what micro fibre is? If it would come out of a washing machine clean it wouldn't be a good cloth. The microfibre is doing exactly what it is supposed to do, its gripping the dirt and holding it. That dirt can then be reactivated later on Hello! - Cross contamination anyone? The best way to clean a microfibre cloth is to get some carpet cleaner and degreaser. Thats your alkaline, ph of 8.5. Now get your acid rince ph of 5.5. Get the dilution ratios correct and some hot water and steep the clothhs in a bucket for a few hrs. The dirt will be broken down and destroyed or neutralized as I prefer. Only now after it scrubbed togerther off itself and still damp and wrung out can it be flung into the thing whats it called? Has strange writing on it, Hotpoint or something or is it Zanussi? But use a sanitizer in the thing not washing powder. Your precious microbious fibrosis clotherinis are now laundered. You can even launder money in this way too.
Neil
