Not sure that it would be critical as it is normally done to get the part to absorb water. The water absorption will "soften" the part acting like a plasticizer. I can tell you that the hotter the water, the faster the absorption. Be advised that the part dimensions will change as the nylon absorbs water.
It is hardly too strong to say that the Constitution was made to guard the people against the dangers of good intentions. There are men in all ages who mean to govern well, but they mean to govern. They promise to be good masters, but they mean to be masters.”
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