We've used these microfibre ropes personally for over 25 years now.
Simple idea that's very well done.
The micro fibre ropes can be used several times over. We've found they are washable at least once and a robust cleaning aid.
Used for cleaning in between cogs of cassettes and freewheels saturated in some degreaser they're especially effective at removing the dirt and grime build up all year around.
Also useful for cleaning hard to reach parts of your bike's derailleurs. For maximum effectiveness our experience has shown us that these work best when you twist them slightly and hold them under slight tension.
Supplied in a pack of 20 we sell these at £10 inc free tracked postage and packaging anywhere in the UK Perfect cleanIng accessory for the cyclist in your life. Manufactured by Finish Line.