HF Media Pot?

I purchased the HF blast cabinet and two of the pressurized media pots. I'm pretty sure I read that the pots should be cleaned of any oil, etc before adding the media but I was unable to pull that up with a search. If this is in the wrong place please feel free to move and will appreciate any input! Everyone have a good day:)

I have used several of the HF pots over the years and never cleaned a single one of them before using - they all seemed to work fine for me and I did A LOT of sand carving. The only modification I made to them was to extend the pickup tube inside so that it would be less likely to clog. Other than that, bought 'em, filled 'em, blasted stuff.

My experience was the same as Gary's.

Thanks guys!