First, you need to take off the filter and place it on the ground. Once you have done that, take a vacuum cleaner to clean out the dirt and debris.
Then, take it to the sink and turn on the faucet. Use running lukewarm water to clean the filter well. You can take the help of a brush to clean the filter properly. Once you finish, turn off the faucet.
Let your filter dry off completely before placing it back again.