So in the alt exchange thread, I was told to get this brush which I will, but I did a little research. What size brush do you you guys use for spreading the senitizer? I see this brush is a typical one with synthetic materials for the bristles versus camel hair - that is the hair from a camel - I kid you not - suppose to be the finest material for brushes - who knew? I gather the synthetic material is better than an 'organic' one? Thanks, Art.