How long do you hold the stick in the pee does it matter?

Frankie • Mommy to Bella 7 and Arthur 2 ❤️

Just wanna check with you ladies.

I’ve had 2 different sets of first response tests the first lot said you had to hold the stick on urine for 20 seconds and then not realised the second set was different I held that set in for 20 seconds also when it should of been 5 🙈 how much difference does holding the stick in pee longer make?