Bunching is when your hair mattes outside of the Sisterlocks rotation in the lock. It usually happens on loose ends or towards the bottom of the lock.
There are some things you can do to prevent & avoid bunching:
1. Make sure your consultant locks down as far as he or she can to the end of your lock during your initial install.
2. Use the right products. Try to avoid sulfates in your shampoo. In my honest opinion, it makes curly hair frizzier. Creamy products and anything with a silkening, detangling or creamy effect will cause your loose hair to fizz which will cause both slippage and bunching.
3. In the beginning, wash your hair ONLY when necessary which is probably much less than you think.
4. In the beginning, braid and band every time you wash.
5. Get regular retightenings at least every 5-6 weeks especially if your locks have not matured. Your consultant can better monitor bunching and slipping if you go regularly especially until your locks mature.
If you already have bunching, here is my video on some things I did that GREATLY improved the bunched Sisterlocks.