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Try running it at 15v or 18v if all your electrolytic caps are rated high enough.  I messed around with a Dirtbaby for a good long while trying to clean in up and the best single change was running it at 18v.

Nice thanks for tip timbo_93631. I'll make a voltage doubler and try that too. Also i was thinking about bypassing IC1_A section with a switch around C7.
Thx

Awesome thanks a lot!

Thanks @madbean, i swaped this one by a 330k already,  and it gives me a little bit less gain in the pot, but it feels like i lose unity when the level is at 0. (Also i am using a Linear pot in the level section)
thx

Hello eveyone, this is my first post here.
I've  successfully built the dirtbaby, everything's work as expected.
BUT , I wish i could have less overdrive in the echo section. I have checked the components values and it's all fine. So my question is: what components could be modifyed around IC1_A to get a clean level action around the first half of the LEVEL pot. 
Thanks for PCB's and all the knowledge this site spreads!