I have my router on the first floor. I am using a powerline adapter to get ethernet to my desktop in the room right above but it kind of sucks. I want to install an ethernet cable from the first to second floor. The issue is its an exterior wall. I tried to run fishtape down the wall but i run into some time of obstruction. There is insulation in the wall so i cant really see down it. I dont know what my next move should be.