Please read this description before commenting..... and please don't watch this until you've watched part 1, my video about "rosin". It is vital that you don't miss it, rosin is the cure not the cause of issues. Start by getting the rosin on then at least you'll know that you've started correctly, if you don't then you'll be lost forever and will never ever know why, ever. Anyway this is a vid demonstrating my method for applying cotton it is called part 2 for a reason, it comes after part 1 called "ROSIN" did I mention that already? Never complain that "I put the rosin on and it sounded terrible so it must be the rosin that caused it" it isn't, it's something else, it'll be very likely too much string pressure on the wheel or cotton so..... ok.........you've watched rosin? yes? ok move on.... I use balls of 100% viscose (rayon fibre in the USA) it's used for make-up removal and on bits of babies..... some people use tampon cotton or the stuff you find in medicine bottles. I don't use natural cotton, it's too slippery. Find stuff that pulls out into long strands as shown with no bobbles in. Check out the bags of cotton balls you find in pharmacies until you find one that looks like the one I use.... would be my advice, the badminton racquet string i use for the high d chanter is Yonex bg65 "soft feel" Good luck!