My chanting is not so good lately, so I feel like a hypocrite when I tell others to chant.
Thanks for your question.
This is a very common dilemma. Generally, devotees go through times when it's difficult to chant, and the mind becomes restless. It's important to just keep chanting. Try to chant in the early morning - no phones, no sounds, just a few pictures and a peaceful atmosphere.
Feeling guilty won't help, but being determined and enthusiastic to improve will be very helpful. Depending where you live, you may be able to attend one of the many japa retreats being held at various places. Also, there is an online japa (personal chanting) conference every Saturday morning which you can find out about via Krishna.com and perhaps you can attend that.
Association of devotees who are serious about chanting can be very helpful in improving your japa.
I hope this is helpful.