Why the energy production will be weaker when the Solar PV panel lack of inspection?

kimixiong522

I was recently asked by others,Why the  energy production will be weaker when the Solar PV panel lack of inspection?I thought about it for the following reasons.

-- I think the main reason is that the solar panels cover too much dust, snow, dirt stains, and bird waste. which cause the photovoltaic panels to not receive enough sunlight.
--We should regularly proceed detailed inspections of all the solar panels in order to ensure that the panels can operate well.

kimixiong522

I wonder if there are other possible reasons for this?