Solar pv panel exoeriment on pouring water

What happen when we pour water on solar panel ?
We did experiments on that and obtain higher efficiency when we pour water.

https://youtu.be/H-kWXn5Krb4

For video click on the above link.

PV panels efficiency improvement

PV panels converts lights energy from the sun to electrical energy.but unfortunately the efficiency will be around only 20-30% only. Me and my crew doing project works on the improvement of the efficiency.