Toilet trouble

Nicola • Married Mummy to 2 girls and 1 Angel baby, pregnant with my 🌈
I'm trying to teach my 4 year old to wipe herself after she's had a poo..she's fine to wipe when it's a wee but has a total meltdown when I try to encourage her to wipe after a poo. I'm worried about her starting school and is 4 too old for me to be checking that she's clean? Any advice welcome.