you shouldnt need more lye or water after the first pull as the ph shouldn't have changed after extracting naptha... whenever you shake up the solution for a little you have to stop and release the lid and it releases all pent up pressure. I'm sorry to hear that it happened but your lucky you weren't in the room with your safety materials off...never add more lye or MHRB if the bottle still gets hot when you shake it...
SWIM adds a little lye (to about half total water), caps bottle, shakes until bottom stays cold, uncap and add some lye & a little water, repeat when the is done and all lye & water is mixed and stays cold on bottom when shaken. Always uncap & recap after finished shaking to prevent this from happening.
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