My problem is my Hayward Ultra pool vac is not working very well. It is about 7 years old. It used to travel the pool pretty good cleaning all areas but now it just kinda sits in one area. I just had all the parts replaced. I broke down my DE filter completly and cleaned the filters and re-added a DE alternative. My hoses are all pretty new, 6 months maybe. I'm not sure what I should do or look for to troubleshoot this issue. I'm not sure what more info I need to provide but any help in heading me in the right direction in troubleshooting this would be appreciated. Thank you.