My Dyson does not appear to have the suction it had when I first bought it, which was about 1 1/2 years ago. The floor part appears to have no suction whatever. I have taken it apart to check for any restrictions in the areas that are obvious. I can't find my manual yet and would like to know what else I can check. The filter is clean, bagless is empty and to the best I can see no restrictions. When I run the vacuum across my carpet dirt; etc. remains until I use the hose by itself and it does not appear to have the suction as when I first bought it. Any suggestions and can I download the manual? Thanks