> ## Documentation Index > Fetch the complete documentation index at: https://docs.pulseairtest.com/llms.txt > Use this file to discover all available pages before exploring further. # Cleaning and maintenance ## Cleaning the equipment The outside of the equipment should be cleaned when necessary using a damp cloth only. Do not use solvents, cleaning fluids or abrasives as these could damage the equipment and materials. On the inside of the controller, only a soft, lint-free cloth should be used to clean the touchscreen display. Gently wipe in circles to remove grime and fingerprints and avoid scratching the display. Ensure connectors, sockets, and sensors NEVER come into contact with water or other liquids, as this could irreversibly damage the equipment or electronics, and cause a potential risk of electrical shock. ## User maintenance tasks To guarantee that all testing is carried out safely and accurately, and to ensure that your Pulse system maintains its performance for as long as possible, please follow the maintenance schedule below: *Drain air receivers* When charging air receivers, small amounts of moisture from the ambient air will condense and collect within the pressure vessel. This needs to be removed to ensure optimum performance and accuracy. Refer to Draining air receivers for the correct procedure. *Hoses, cables and power cords condition check* Check all air hoses, cables, and power cords for signs of damage or wear and tear and replace as necessary. These checks ensure safe and efficient operation of the system. Replacement ancillaries are available by contacting us. *System airtightness test* Checking that there are no leaks in your equipment and hoses will ensure fast charging and optimum system accuracy. Fully charge the air receiver to 10 bar and leave for 2-3 hours. Observe any changes in the pressure gauges and on-screen pressure readings. Report any leaks to our support team.