This cleaner tape contains a small bottle of cleaner fluid in a compartment on the tape itself. Pour a few drops of the fluid into a yellow plastic hole on the top of the cleaner tape and then run it through the vcr and it will automatically stop when finished.  I didn't think the fluid got the paper tape wet enough frankly but you can use as much as you need I suppose.  This is really a must have for anyone that still uses a vcr because it's so cumbersome to try to clean the head with other objects.