2. After brushing each time, apply a layer of soap with high-efficiency bactericidal properties to the toothbrush, wash off the soap after 24 hours, and then apply it after use.
3. Soak with 0.1% Xinjiezhi or 0.1%~0.5% peracetic acid. After brushing your teeth, put the toothbrush in the container containing the disinfectant. The disinfectant should be a little more than the toothbrush bristles. Wash it when you use it. Replace the disinfectant after 1 week.
https://www.samemater.com/toothbrush/soft-toothbrush/adult-ultra-fine-soft-bristle-toothbrush-anti.html