Remember Bath Method#1? Three handfuls of water were poured on the head. Sunnah: wash your head thrice, even if you’re under the shower.
Narrated Jubair bin Mutim:
Allah’s Apostle said, “As for me, I pour water three times on my head.” And he pointed with both his hands.
Narrated ‘Abdullah bin Zaid:
The Prophet performed ablution by washing the body parts twice.
So, we now learn that one may wash their body parts once/twice/thrice in wudu. Prophet (SAW) used to practice all three options. Keep in mind though, you cannot increase it to 4 or more, because that’s not allowed. How to increase radiance then? Do as many ablutions in a day as possible. :)