Recently, we cleaned the carpet in a few buildings of this military installation. Some of the military personnel stated that they'd never seen the carpet cleaned in at least 30 years. Suffice it to say, much of this carpet had not been adequately maintained and was in dire need of cleaning. Unfortunately, without regular cleaning and maintenance, much of the carpet has an irreversibly dingy appearance due to physical damage to the fibers from abrasive soils. Even so, there is still a night and day difference after we performed our cleaning.