You would be amazed how much dirt can get into your artificial turf. Leaves, dust, sand and all kinds of other organic matter. Over time, this can form a layer of humus or silt deep in your coastal grass due to rotting and seeds of moss, weeds, grass and all kinds of other plants can start to germinate in it.
It is therefore a matter of removing it from your artificial grass on a regular basis with an industrial vacuum cleaner or a brush machine.
This handy motor-driven brushing machine is ideal for this.
If you use it against the direction of the blades of grass, you also brush up your blades of grass so that they stand upright again.