1. How often should i replace them? (If i do, i believe i do).
2. Where can i buy more? (The device comes with 10 if I'm not mistaken).
3. Is using one or two loops / rubberbands preferable? (I think you can use one or two at a time, that or loop it one or two times).
2. Where can i buy more? (The device comes with 10 if I'm not mistaken).
3. Is using one or two loops / rubberbands preferable? (I think you can use one or two at a time, that or loop it one or two times).
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