My 200 high target line has vanished from my dex receiver screen!?! What the heck?

Please forgive the obvious, but could you have disabled the high alert by mistake?

I have never seen this. I have owned 5 dexcoms and never had this problem. I tried just now to even see if it was possible to disable the high alert and apparently if you turn the beep or vibrate completely off the hash line goes away. If its not disabled I would try a restart. Then I'd call dex if that does not resolve it. Good luck.

Call Dex. i am thinking the transmitter is done. Slowly dying?

I feel stupid....It is working now :0) Thanks Ed. I must have disabled the alert in my sleep. lol