I don't know if this happens to you guys but sometimes I get so absorbed debugging an issue that the fix is right in front of your eyes and I can't see it. Getting a friend to look into your code sometimes helps.
Its embarrassing at times, is it just me or this happens to others too? Any tips to avoid this.
Over the years I've found this happens with less frequency because every time I've gotten rattled to the core over something that turned out to be simple, my brain made a strong mental note to watch out for the same thing in the future.
So I guess I'm saying maybe look at it as a good thing when you get really frustrated but then solve the issue, you might be building up your knowledge base in a lasting way that will save you time down the road.