I use Systema sponge dental floss.

Many of you use this dental floss, right? It is Systema sponge floss, and they say it thoroughly removes even the remaining bacteria from the gums. The best thing about this floss is that when it gets wet with saliva, it swells up like a sponge, efficiently and cleanly removing tiny specks of chili or other debris left on the gums. Before using this, I mainly used thin floss, but that sometimes made my gums hurt. However, since this is soft, I like it because it doesn't injure my gums and I can use it without any pain.