Rigunan da ke hana harsashi tsawon lokaci nawa ne?

Sulke mai laushi: Shekaru 5-7 (shafar UV da gumi suna lalata zaruruwa).

Faranti masu tauri: Shekaru 10+ (sai dai idan sun fashe ko sun lalace).

Koyaushe duba jagororin masana'anta don ganin lokacin ƙarewa.