Cardclene Cleaning Cards with Isopropanol for Swipe-reading Machines Foil Sachets Ref CCP020 [Pack of 20],Assorted,8.5 x 5.5 centimeters

You can pay a fortune for these cleaning cards - these work very well and can be used with motorised card readers without problems - they are good and rigid. Just the right amount of cleaning fluid - will do a couple of readers if you turn it round and use it the other way up!

Does the job. Effective, few ones packed separately so lasts for a bit