Air blower - this tool will help you blow some air to forcibly bring out stagnant dirt and debris.
Brushes - It is used for the in-between parts or edges to remove small dust particles. It is required to use a soft type of brush to lessen damages to the lens.
Microfiber cloth/ disposable wipes - It helps to wipe some dust and dirt.
Cleaning Fluid - A cleaning solution based on alcohol or deionized water. The best to use this is to drop or spray it into a cloth before wiping it on the surface.