I'm wondering how to keep mascara from smudging all day long.

I'm wondering how to keep mascara from smudging all day long.
Even if I apply mascara thoroughly in the morning, streaks often appear under my eyes by the afternoon.
I also want to know tips on how to make my eyelashes look longer and fuller when applying mascara.
I'm also wondering if there are any products that prevent mascara from smudging easily, especially during the summer or on days when I sweat a lot.
They say using waterproof mascara is good, but it seems to irritate the eye area a lot when washing my face.
So I want to find a way to make my mascara last a long time while being easy to remove.
Since I wear makeup every day, I think just choosing the right mascara can change my whole impression.
I think I can do my eye makeup much more confidently if I know these tips.