Wondfo OPK users

Sarah • 3 pregnancy loses. 4 failed IUIs, IVF with 1 failed frozen transfer and finally have our healthy boy!! Momma of a 3 year old, angel twins 10/19, and successful fresh IVF is giving us boy two in November!
Hey ladies! For those of you who use wondfo opks.. What time of the day do you test? The package doesn't specify and I don't think it matters but just wanted to see what everyone's best results have come from?! I was testing about 5pm every day but I am worried about the amount of water that I drink during the day.. Though I try to hold back towards the end of my work day.. But just thinking it might be easiest for me with FMU. Thanks in advance :)