We are cleaners not magicians.
We can not guarantee the removal of all marks but will aim to certainly remove or make the appearance look better. When cleaning mould and mildew it can depend if the spores have embedded in to the silicon or grouting and this will be dependant on how much can be removed. Marks on carpets will be spot treated but if the carpet has been treated by the client previously to the team arriving this can cause the mark not to be removed completely.