My cup smells weird...

It's the second time I'm using my cup, I mean second period and the first time I let it all night in.

This morning I wake up, go to toilets and notice a weird smell which is normal since I let it all night long, but even after washing it it keeps smelling ...

I wash it with a soap made for intimate area hygiene :/

Is it normal???

For girls using the cup, does your cup smell as well???