Mold doesn’t need light (quite the opposite: UV exposition might even inhibit mold).
But a clear tank helps determining if it is clean. And also if it is empty.
BTW: OP almost certainly did not have mold, but algae.
Had that myself once, coffee maker is placed right at a window…
Mold doesn’t need light (quite the opposite: UV exposition might even inhibit mold).
But a clear tank helps determining if it is clean. And also if it is empty.
BTW: OP almost certainly did not have mold, but algae.
Had that myself once, coffee maker is placed right at a window…
Yes sorry, I did mean algae. All the coffee makers I think of have a black plastic tank. Some have a little window to see the water level.