I’ve heard if it you touch the saliva it still doesn’t break your wudu
But you need to watch your hand 7 times
Yes only 4 thins break wudu among the Shafici jurisprudence which most somais adhere to.
Farting, Peeing, Shiting etc
Touching your private parts with your hands. Your back hand is okey though.
Dozing off like sleeping or becoming unconscious. Although dozing off for a short while while sitting is ok
Touchingg skin to skin women that are non mahram. (Wowed that are not from the immediate family that you can marry)