I already cleaned Karcher VC3 Plus filters and hose, but it still making loud whistling noise every time I used it. The suction power was decreasing. I’m pretty sure something was wrong with it but I don’t know what. It still under warranty. I didn’t plan to send the vacuum to fix since we’re under Covid19 Movement Control Order (MCO). Well I didn’t have much choice. I decided to fix it myself. That is somethings stuck inside the vacuum. So here is the video how I get it fixed.