For me it works better: open the floppy Drive, clean the dust off with a brush then use isopropilic alchool or electronic cleanig spay on the sensor switch.. and very gentle use a cotton swab with Isopopilic alchool and clean the heads .. like many Ppl have said before Dust is the Nº 1 enemy of fçoppy drives
Ps I even use a cotton swab with a litle bit of fine oil and lubricate the shaft where the heads Run and also the mottor coil..
dont mind my english