[UKBusinessLive]

Have you contacted your Host?? and explained to them, I had a site years ago and it was forever slow, when i complained they found out that a fan on the Server Rack was not working, and everything was getting over heated

They fixed it and all went back to normal.

Another problem with slowing down sites especially when members say and you can't see it slow is Spyware, Have you recommended to your members to scan their PC's (Do this if your host says all is well!)

Another thing you could do is ask for a reboot of the server, that worked for me a couple of times.

But Remember what worked for me may not work for you You need to eliminate everything bit by bit to see where the problem could be.

Good Luck