Vacuuming is one best maintenance care one can do to maintain carpets day to day. Vacuum slowly and in different direction. Yes this is hard in hallways, but once in awhile give in a try. Most vacuuming is done way to fast and even the most powerful household vacuum can not do its best or even do a good jobs moving to fast. Give the vacuum time to left the pile, agitate and remove the soils. Remember that 98% of soils are dry and can be removed if done properly.
Leaving the soils in the carpet allows the dirt to go deeper into the carpets fibers and these soils “cut” the fibers and break down the carpets appearance.