Agilent 1290 Infinity II Vialsampler - backflushing the needle seat?


is it possible to manually backflush the needle seat of the Agilent 1290 Infinity II Vialsampler. We performed analyses of some sticky APIs and observed persistent carryover of those analytes in our blank samples. I've found some general procedures for other types of vialsamplers but I can't find anything specific for 1290 Infinity II Vialsampler. I've checked every manual I have. Is it possible to manually remove the needle seat with its capillary and connect it directly to the waste outlet of the switching valve of the pump and set the pump to purge as explained at the following article:

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