Pee on a stick

Tay Tay
Hi ladies,
 This thought have always crossed my mind ...does anyone really follow the amount of minutes written on the leaflets of a preg test or just test according to how one wishes...
Tested Witt Frer this morning and actually dipped the stick in my urine for more than 5 secs like the leaflet read and I had an Evap line...clearly colourless...really don't want to think about it.