Since it goes on food, I would not trust just any old string. I use what's called butcher's twine. One spindle will last a long long time. Perhaps you can find something like this locally: https://www.amazon.com/dp/B06XDMQTD8/?tag=tvwb-20
J Grotz: Looks good and thanx for your recommendation. The Amazon Site states that this twine is flammable, so, as long as you do not put it over a direct flame one should be OK.
I gather that my untested Cajun Bandit Rotisserie with a tied-up chicken will spin close to the lighted Charcoal; thus, will not ignite this Twine??
When I started tying for the roti, I googled "food safe twine." Tons of options. Just avoid any twine that might be sprayed or coated with wax/paraffin
Pretty much any cotton or linen string/twine should work (check the gadgets aisle in the grocery store for small amounts.) Once it soaks up a little moisture, it just won't ignite.