I have a question for those who know something about bicycle disk breaks.

My breaks never gave me any problem until I did a long 200km bike tour. Tour was mostly flat, but one steep climb about 500m (vertical) and a steep decline. During the continuous decline my breaks got very hot, so I did some pauses to not glass them.

So the breaks appear to work fine, but now as soon as it gets wet they squeak at the lightest breaking and even seem to have less grip.
I have driven them another 500km and no change.

Did I glass them? Confused since they have good grip in dry conditions

Inb4 I have original Shimano break pads.
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