I had a visit to the er a few years ago had the same issue several times and had the same symptoms told the er doc, I know I am needing xyz, had the symptoms before and it's always been this condition, and the dr said well I still have to due these tests, I said I understand but look at my chart been here before, and it should show that I had what I'm telling you, but I know that you have to do your job. He listened to me read the chart and said yes he sees that I had been there before with the problem I described, and ran the tests and came in smiling and said i don't know if it's good news or not but your right! he kinda chuckled, I said doc, I knew you had to do the tests because it's your job but I knew what was wrong and thought it would be easier to get straight to the point. So it was the same as your dryer in a sense. BTW do you milk your yaks? I know I heard in some areas they use yak milk.
you can and some I know do BUT personally I don't have that type of death wish. Also most of my "cows" aren't that tame.