Also with bent pipes, bristled pipe cleaners can be a pain trying to get around the bend. They can be very pointed at the tip so it may scrape the inside of your stem. I've notice if your having trouble getting the cleaner to pass all the way through, bend the tip of the cleaner a bit and like the other gentleman said pull back turn a bit, push in, back out, back in until it pokes through. Hope this helps a bit
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