All i do with mine is either put it in a bucket and run a hose through it to wash any lose bits out. Once I've done that a few times to get the the lose bits out, spray it with the cleaner that comes with the kit and leave it to soak in. Then when you wash it out just repeat that process again. After you've rinsed it for the last time to get all the cleaner out, allow it to dry and then stand the filter on something i usually use news paper and just spray using vertical strokes around the filter until you've given it an even coating.You can give it a light coat first and then once it's soaked in just follow around again with another coating and then leave it to dry.
That's pretty much it.