Some keys not working on Zagg Folio for IPad Air 2.

I have the iPad air 2 and a Zagg Messenger Folio keyboard.

I've had it since December and a few months ago the following buttons stopped working.

P { [ " : ; ' - and the left arrow.

I found a website that told me what buttons to press to re-sync the keys that were not working. It happened again and I cannot remember what I did the last time.

I've already done the whole "Forget this device" I've re-paired It, I've updated to the latest iOS, I've restarted my iPad, I've done absolutely everything that I possibly could do. So please help me!