Hello. I bought 2 Corsair AF120 Quiet Edition LED fans 2 weeks ago. I installed one of it into the bottom of my case (unfiltered), and the other one to the front (filtered). However I noticed something after I installed it. While the bottom fan was blowing air, the front fan didn't! I placed my hand where they were supposed to blow air, I couldn't feel the front fan blowing any air in(although it as running at full speed/12V). I took out my front panel and blew as strong as I could, but I noticed that only a little bit of air was going in (roughly 25-30% of what it should be). So I plan to remove it and change it with another filter that doesn't restrict the airflow that much (maybe a homemade one such as a pantyhose etc.). Does anyone have knowledge about this case? Can I remove the dust filter? If I can't what should I do then? Any suggestion is welcome.