The safest way to clean your shag rug is to remove loose soil regularly, treat spills gently, avoid soaking the rug, and let it dry completely before walking on it again. For a deeper clean, especially on wool, delicate, sentimental or large shaggy rugs, professional rug cleaning is often the safer route.
Quick answer… To clean a shag rug safely, shake out loose dirt where possible, vacuum carefully using a suction-only setting or upholstery attachment, blot spills with a clean cloth, use only a mild cleaner suitable for the fibre, avoid harsh scrubbing, and allow the rug to air dry fully. If the rug is wool, viscose, silk, heavily soiled, pet-affected or difficult to dry at home, ask for professional advice before attempting a deep clean.