After every use, clean the pre-filter inside the dry bag and rinse out the bag. With both taps closed, squeeze the red bulb 3 times.
Each time, the bulb should be compressed fully and then allowed to refill completely. Then, open the red tap and let all the water drain from the filter. Note: water from the red tap is not filtered and therefore not safe to drink.
Detach the quick release to separate the dry bag from the filter and let both dry before storing them.