I have a Slingbox 500 connected over WiFi to my Verizon Fios network. I use an Amazon Fire Stick to watch my cable remotely on another HD TV not in my house. The problem is the time to change channels is incredibly slow. If I am watching the SlingPlayer App on my iPhone there is no lag time in changing channels. Does anyone have any advice on the Amazon Fire Stick? Is the Fire Stick the problem? What other device should I try instead?