An 8 on the CB squelch is rather high - you are limiting your range severely. I suggest setting it as low as you can without having background noise (typically around 3 or 4). You get the occasional squelch break, that's to be expected. If it happens a lot, then raise it one and see what happens. If you are in a really noisy area, like under power lines or something, tighten it up temporarily, but remember to loosen it again later.
I don't know how many times I hear someone calling on the CB, and you answer them and they can't hear you (a block or two away) because they've got their squelch to tight.