Good thoughts Dennis. I'll be the first to admit that many times we take for granted that everyone knows where cookies are stored on their browser and knows how to clear them or knows how to use another browser. At the same time I've seen members upset by giving to much detail and folks have been accused of talking down to them.
So there is no perfect / obvious answer.
To clear cookies in IE go to tools / options. to clear cookies in firefox go to tools / clear recent history.
Their is no perfect browser. IE frustrated me more often than not. I had other members tell me about firefox. It's not perfect but it works well.
If you are interested in trying out firefox (IE will still work, this simply gives you an option) ...here is what you do:
Go to
www.google.com and search for "firefox" & "Download".
A link will be near the top that is mozilla (the non profit org that created and updates firefox). Click on it and select download firefox.
Remember the directory (aka folder) that you save firefox in. Once firefox has downloaded you go to where you downloaded it to and double click on it to install it on your computer.
The install is pretty straightforward. Accept defaults and let er rip. Once done you want to start up firefox. The last install window has a check box that you want to check so that firefox starts after you click finish. Be sure to check it.
Once firefox starts up it will ask you if you want to import your favorites from IE. Say yes to this. Firefox calls them bookmarks instead of favorites but they are the same thing. The favorites are just copied and will still exist in IE. It will also ask if you want to make firefox your default browser. Say yes to that. IE will also make this check and you can easily change back to IE if you ever want to.
Now, I bet that fixes the log out issue some have been having; at least I hope it does.
If any of this does not make sense please feel free to ask for further info and give as much detail as you can on where you got stuck.
Good luck.