Battery Low "wlan_wake" kernel wakelock high drain problem

Hello, I'm having a problem, my Wakelock Detector detects a lot of wake time (72%) by a kernel wakelock named "wlan_wake" and I don't really know how to solve it! I have a Samsung Galaxy S4 i9505 with the 4.3 android version, official release, and this started to happend less than a week ago. I cleaned cache and dalvik, I tryed to let the wifi always off, and nothing worked... Solutions?