Hi hope I g someone can give some advice on my own, moved into new home 3 years ago and the lawn was like a carpet of moss so I treated it and raked it out, but it came back the next year, Iknow the area is very damp due to all the trees outside sun does not get in it, I heard adding sand will help absorb the moisture, if this is correct do I just sprinkle it over or do I need to toss it in and dig it in, and what seed is best for damp areas, looking for a permanent fix only a small lawn thanks