Delegation: sometimes it is like washing dishes
Let's face it. There are very few people who relish washing dishes. Our kids certainly don't enjoy it and make it known to me on a regular basis. So what do I say to them? "Guys I know washing dishes is a drag. I don't really like it either. We have to do it so let's do our best and get it finished so we can do other things." They grudgingly wash away.
My point? In a perfect world we would only delegate the really stretching and interesting work but sometimes you just have to "do the dishes." When you are delegating mundane work, acknowledge that fact and encourage your staff to do their best. Tell them it just has to be done and that you've been there. It makes it easier.