What`s the proper way to use the glass cleaner concentrate? Using a terry towel, or a microfiber? I`ve got some stubborn streaks that just won`t come off, and figure a concentrated formula may be just what I need.
Also, what is the proper way to apply #40? Do you need to spay it on, and then buff it out, or how do I use it? Also, I`ve got some residue left from my last interior protectant, and it`s quite shiney, how would I remove this before applying #40?
Thanks.
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