Thank you, Miri.
In fact I was exaggerating, it's nothing actually. The wound is less than 2 cm long and about 1 mm deep and just as wide, that's all. I suppose your boyfriend has it worse. [Grits his teeth like a real hero.] I guess I'll make it. [/Grits his teeth like a real hero.]
I think I'll leave it in peace, but I might try some calendula when the wound is closed for additional regeneration. Thanks for the hint!
I wrote here mostly because I was really surprised that this could happen. I mean, I was washing up a teapot, not a knife! And not a cheap one, either - you should expect them to be harmless, shouldn't you?
Cheers!
Markus