What is this disease?

Amylovesplants

Does anyone know what's happening to the leaves of the plant and how do I treat it? There's white spots and also white lines.

K67

I think the lines are caused by the leaf miner but have never bothered to do anything about it.

Dovefromabove

K67 said:

I think the lines are caused by the leaf miner but have never bothered to do anything about it.

That’s my thought too.