Edited 29 April: this is what I got from the seller:
'it might be from weak spots in the wool, it happens in about 0.1% of the pads she has sent out, and I guess cannot be helped' and she offers me a new pad.
I guess we're not meant to be together. You can read my review here.
First, I don't like they way the stain. Second, they take forever to dry after I wash them. And the third, the worst part, the wool backing of my Regular pad is already damaged.
I took the picture using my Motozine, sorry for the quality..but you still can see the holes, right? I used Paint to draw circles near the holes.
It has holes in the wool backing. Yes, holes. If it were a heavy day, it would leak.
I discover this when I squeeze the water excess after cleaning it, and I see holes.
- I treat it the same with my other pads: handwash, overnight soak.
- I keep it inside a large toiletries bag. If it's a moth doing the thing, then my other pads would have holes too.
Luckily, it only happens on my regular pad. The large and XL pad are still in good condition.