Some of us don't like D shaped cups at all. Personally, i found the ones in the image looking funny at best.

Not everyone has some preferences like me, and for many people, comfort is definitely more important than looks

It looks like mould to me.

I would personally dray it for a day or two, and then gest blow away with air the remaining.

If it's worth a try, and if that doesn't work, then tray diferite ways