I always had a problem reading bass clef; so do most people it seems. For a couple of reasons, usually, you learn the right hand first so it is more familiar. Secondly, the treble clef is more melodic, usually. Thirdly, in a hymn book those annoying words get in the way of what was supposed to be an easy read.
Well, I have a method that should help a lot. Sing and say the letter names of the left hand while you are playing both hands. It IS difficult at first but you will find that you are watching the right hand and reading it but yet you are saying and singing the letter names of the left; meanwhile you are hearing both parts you will have no choice but to play the right notes in the left hand.
It IS strange and not so easy to do; but it pays off big dividends in a matter of a few weeks of doing this your reading should improve 100 percent.
If you are weak in your right hand as well then do the opposite. You may have to just do this with one or two measures and loop them over and over until you are comfortable. This works best for music where there are no vertical chords like what you usually may find in a second grade reader. Or, you can try an invention.
