What should technicians do before cleaning to check for potential issues?

Before cleaning upholstery, it is crucial for technicians to test the fabric. This step is essential because different fabrics react differently to cleaning solutions and methods. Testing helps identify the appropriate cleaning technique and solution that can be safely used without damaging the material. It allows the technician to determine whether the fabric is colorfast, how it will react to water or solvents, and if it is durable enough to withstand the cleaning process.

While inspecting for visual damage and evaluating cleaning solutions are important steps in the overall process, they do not specifically address the fabric's reaction to cleaning. Measuring fabric thickness can provide some insight into the fabric type but does not necessarily inform the technician about its cleaning properties. Therefore, testing the fabric before cleaning is the prioritizing action to ensure proper care and avoid any potential damage during the cleaning process.