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You should avoid using a pressure washer on any surface or item that could be damaged by the high-pressure spray, as some materials are too delicate to withstand the force.

Key items and surfaces to avoid include:

• Electrical Components: Never pressure wash electrical systems, as water can cause short-circuits and create a safety hazard. This includes utility meters, breaker boxes, electrical outlets, generators, and HVAC or air conditioner units.

• Delicate and Fragile Materials: Fragile items can crack, shatter, or be stripped by the pressure. Avoid pressure washing windows, glass, light fixtures, shingled roofs (especially asphalt), and stucco.

• Painted, Stained, or Sealed Surfaces: Unless your goal is to strip the finish, do not pressure wash painted surfaces, stained wood (like decks), or anything with a protective seal that could be stripped away. Be especially cautious with older surfaces that may contain lead paint.

• Soft Woods and Certain Decking: Delicate surfaces like softwood, composite decking, and antique or wooden patio furniture can be etched or damaged. If you must wash wood, use a lower-powered pressure washer with a wide-angle nozzle to prevent damage.

• Living Things: Never use a pressure washer on people, pets, or plants. The force can cause serious injury and will destroy landscaping.

Steam cleaning carpets uses less water and has faster drying times. Shampooing carpets involves applying a carpet shampoo and using a machine that works it into the carpet and fibers. This method uses more water, so it tends to take longer for the carpets to dry. Which method should be used depends on the type of stains, level of dirtiness, and preference.

Professional carpet cleaning can cause mold if the job is not done properly. There are two ways this can happen—if your carpet cleaner fails to dry the carpet properly, or if your carpet cleaner uses an excessive amount of water during the cleaning process. Mold can grow wherever moisture is present, so make sure you hire a pro who knows the process inside and out.

While it may be possible to use a carpet cleaner on a couch, it is often not recommended and requires significant caution. Some carpet cleaners contain harsh or abrasive chemicals that are unsuitable for soft upholstery fabrics. To determine if it's safe, always check your couch's care tag, which dictates approved cleaning methods. If you decide to proceed, ensure the carpet cleaner has an upholstery attachment and that you are using a cleaning solution specifically designed for upholstery. It is also crucial to avoid oversaturating the fabric. Before cleaning the entire couch, always test the cleaner on a small, hidden area to check for potential damage or discoloration.