What should I use to make my lawn grow and kill moss?

I’ve heard of products such as Mo Bacter and Miracle Gro, but I’m not sure if they workEvery week a Guardian Money reader submits a question, and it’s up to you to help him or her out – a selection of the best answers will appear in next Saturday’s paper.Our lawn looks awful as it has become more moss than grass and I’m wondering what to do about it. Products such as Mo Bacter and Miracle Gro promise to kill the moss and promote grass growth – but do the