GBL to GHB cook time?

[DrStrange]

SWIM followed "the Definitive Receipe" posted by Mr.G. After adding all the NaOH he let it stay at 100 degrees C for about 15 minutes with some stirring as he had read somewhere that this was a good thing to do to make sure the reaction was complete. There was definitely a lot of conversion that went on but there is still a bit of a solventy odor and taste. Not a lot, no where near what was there in previous batches done without heating. And the effects are noticably different than the other batches which were presumably mostly GBL, but still, maybe not complete conversion.

Anyone have this problem? Maybe leaving at temp for longer would help???

Thanks for any tips as SWIM really liked best the Dr. stuff he got once.