Hi All I just purchased my master built 30 electric smoker. I am excited to start using it. One question I have is how many times during the smoking process should I add wood chips? The manual says I can only add one cup at a time.....How long will one cup of chips last at say 275 degrees? Please let me know your thoughts. What should I do for my first time? I have never smoked anything before......I am a rookie.