The first stage in cleaning is usually surface cleaning, to remove all loose surface dust and debris that may have settled on the object, and often this can lead to excellent results in itself.
In its simplest form this involves vacuum cleaning, for which we have a range of tools to allow us to apply the correct suction and to reach difficult areas.
Other methods involve materials which help us lift off the soiling mechanically. This method can be time-consuming, but the results are often excellent and it allows a measure of cleaning when wet-cleaning is not possible or desirable for a variety of reasons.
On other objects the problem may be localised staining, such as dirt marks, watermarks from flooding, or colour bleeding stains. These problems are often difficult to resolve, but we have a range of solvents and suction techniques at our disposal to try to achieve the best possible result.