Have you ever noticed a small amount of water inside the bubbles of your solar pool cover? No, it does not mean your cover has holes in it – the water is not seeping inside. It’s actually just condensation, (like you get on the outside of a cold drink). It means that the air inside the bubble is a different temperature to the air outside of the bubbles. It is not a fault with the cover, and does not mean the cover is damaged. It is perfectly normal, the water droplets will disappear as soon as the temperatures inside the bubble and outside equalize again.
This condensation will not affect the performance of the pool cover in any way. 🙂