The potential problem with this is that they can often be left behind when you clear your other browser data. Fortunately, Chrome has a solution:
If you use Chrome as your browser then deleting Flash cookies is a quick and simple task.
Firstly, click on the spanner icon in the top right hand corner of your browser. From the drop down menu highlight Tools and then click on Clear browsing data…
This leads to a new mini menu as you can see in the image above. Ensure that the highlighted line – Delete cookies and other site and plug-in data – is ticked and then click on Clear browsing data.
You have probably noticed that there is the ‘Obliterate the following items from:‘ drop down menu here. You can use this to choose from what point in time you wish to remove Flash cookies, as seen in the image above.