All of the following are guidelines for cleaning the oil-immersion lens EXCEPT which statement?

A) Use a lens tissue to wipe the oil off the lens.
B) Use the coarse focus knob and move the objective lens away from the slide to create a working space for cleaning.
C) Place a drop of lens-cleaning solution on the paper and completely remove any remaining oil.
D) Use a paper towel to wipe the oil off the lens.