I have a new Vector (sold by Home Depot) which is made by Hisun and is a HS 700. It has only 7 hrs on it and the other day I noticed its starting to have a slight brake squeal in the rear brakes. Its not been in a lot of mud and water. Maybe 12 inches for a very short time. I have hosed out the brakes when I first heard the noise and that seemed to work for a short time and it came back. Is this something that is usual during a break in period and will it go away?