A method to monitor the relative position of a magnetic tape disposed in a tape drive, where that tape drive includes a first tape reel motor and a second tape reel motor. The liquid storage part stores a liquid. This improved structure has achieved reduced friction, reduced noise, reduced power consumption, longer life and higher rotational speed. Each graphical user interface element is then associated with an abstraction interface. The process involves contacting the mixture with at least one selective removal agent selected from the group consisting of SO3 and RSO3H, wherein R is selected from the group consisting of F, Cl, OH, C1-C8 alkyl, C1-C8 fluoroalkyl, and C1-C8 fluoroalkoxyalkyl containing no more than two ether oxygens to selectively react the formula Y1Y2C\u2550CF2 compounds.