I have not had that problem, though I will be watchful.
I have many TT pieces. Mostly I find that there is no need to soak. After baking in the 13x9, and others (I have many others!), clean up is pretty easy. I do put them in the dishwasher after a pre-clean, usually, to dislodge any stuck-on stuff.
I also use many pieces for fruit bowls, display, etc. And I have 8 sets of dinnerware. Foolish in some eyes, but I enjoy them.
Cogito ergo sum