Do I dilute my alcohol for my second run in a pot still ?

[magikk]

Hi everyone I have questions for everyone.I'm sure I should have seen it somewhere but I just can't seem to find it.I'm running a pot still & when I run my product though for a second run do I just put in the straight alcohol or do I dilute it with water.I have done two runs by just dumping the alcohol from the first run back into the still & cooked it again.But I want to be safe.Just in case i'm doing somthing wrong.Thanks again Mike