There are many ways to check for dirt in your rug. Lift the corner of the rug and slap the back with your hand. If dirt comes out, it needs to be cleaned. You can also dampen a white towel and rub across the surface of the rug, if the towel gets soiled, it needs cleaning. You can also pull the pile fibers apart and examine the foundation. If there is dirt in the warp and weft threads, the rug needs a good cleaning and we are the ones to help!