Just use toothpaste like everyone else has done for the past umpteen decades. (Not gel, paste...)
I guess you mean something like Crest with the green and blue specs.
I would like to clean my headlight lenses. Would you mind explaining a good procedure to accomplish this with some toothpaste. What applicator should be used..... a sponge...etc.? Should up and down motions be used.... or circular motions?
Inquiring minds want to know.