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Fiber dust or short fibers and fines is relatively easy to remove. An air shower or blowing roll can be used to blow dust out of a felt. A stiff bristle brush mounted opposite an inside roll can also help. Stickies and other organics, pitch, adhesives, surface sizing, oil, and grease are harder to remove. High-pressure steam or hot water showers with or without cleaning chemicals can help remove organics from felts. A bristle brush can help remove stickies from the surface of a felt. Cross-linked resins and coatings, wet strength resins, acrylics, and others can be removed by a high-pressure steam or hot water shower with or without chemicals preferably before they harden.