First time printing with TPU. Another problem I had was that it didn’t stick to the textured print bed, had to go for smooth PEI which I read (and now can confirm) is not ideal. Would satin be better?
That looks like a moisture issue to me. Some TPU filaments will absorb so much water from the air that when heated, the water boils out and creates awful bubbling and pitting in the printed part.
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