ope:
From what I know, they 洗手 after using hands to clean their butt.
What I know is, in singapore, you see a lot of malay family has a extra 水喉 next to the 馬桶.
And they use only 左手解决, that is why you see that they use 右手吃飯, in a lot of muslim country they use 手抓饭 to eat.
that is the same for middle east, South east asia.
I am not sure of 菲律賓, but if they are muslim from 菲律賓, i guess they do the same as
印, not sure about that.
In singapore or South east asia, since they have an extra 水喉 for that use, maybe it is cleaner. But in Hong Kong, the toilets are not design to have the extra 水喉, I suggest if you cannot accept that, you should not hire 印印, cos it is quite hard for them to change the habit.
Otherwise, you should get some 殺菌洗手液 to make sure things are clean.