Carryover G1888 headspace Autosampler

I am working whit GC/MSD and the Headspace autosampler (G1888 Agilent).

I have some carryover on the autosampler. I already run whit a higher temperature on the loop and the line and the issue continues.

Could you recommend some maintenance for the autosampler?

Do I need to replace the needle and the loop? 

Thank you

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