The following text is for questions numbers 23-25.

How to Clean an LCD Screen

1. Shake up the detergent or liquid soap and put it 15- 20 em away from the LCD screen.
2. Spray on the LCD screen surface directly.
3. Cleanse gently using the fabric cleanser or brush.

You can also do the following steps:

1. Spray the detergent or liquid soap on the fabric cleanser.
2. Clean the LCD screen surface to make it as bright as a new one.

Cleanse gently with the fabric cleanser or brush" (step 3). What does the underlined word mean?