Window issues

[shep1001]

Having a bit of an issue with the windows on the Tam. When you close them off the key fob button, often the windows don't close or move really slowly. The driver side is worse than the passenger side. I will take the door card off tomorrow & have a look, any idea's on what to look at first? Don't fancy having to get new motor assemblies as they are thick end of £200 each!