Usage Awning

How many litres of water do I need in order to clean and impregnate my awning?
We recommend the following quantities for a normal level of pollution on a standard-sized awning with a polyester canvas:

• 1 x 2,5 litres Sprayhood & Tent Shampoo
• 1 x 1 litre Power Cleaner
• 2 x 2,5 litres Sprayhood & Tent Protector