I have this all the time.
Get some windex and spray it on a paper towel until damp, not wet. On the 3880 there is only one roller so hold it on the roller and press the load button. Hold it as it goes thru the loading process(8 secs?) Put paper in and resume printing. Will have to do ever 20 sheets or so on matte paper. I actually keep windex behind the 3880 now as it is just part of the process with chalky papers.
I tried this technique and it seems to be better for feeding. Got so bad I thought the PF system was busted or out of time.
I bought a pad of watercolor paper at Aaron Brothers for about $6 on sale. It's about 160 weight so pretty rugged and doesn't tear too easily. Soaks up the WIndex or alcohol pretty well. I saw all sorts of stuff - and ink - clinging to it when I ran it through the printer. A few tests with my cheapo Costco RC glossy seemed to work well again.
However, I still had some issues with feeding the "Awagami Inbe Thin White" though. It is thin, maybe <90 weight. No matter the top (Thinnest feed) or rear (Thicker) feed, it wouldn't take it. I ended up taping a leader off a normal gloss RC paper to the back extending 3/4" to the front and it fed, but it curved up at the sides and threw up some numerical error #1xxx (??) with a "Call Service." Wadded up pretty well, but it is thin so maybe no damage to the printer carriage.
Got it out and taped it on three sides with double-sided tape and it went through with printer platen set to Wider and paper set to 6.
I'm getting the impression the 3880 works within the range of 100 to 300 weight paper for top or back feeds. Less <100 weight it might not take, wad up, or slip. Thicker and you run the risk of a head strike if it curls and break the inner print head carriage slide. Probably why the "Epson Kozo Thin" has a removable backing too for feed issues.
Now if Epson USA would import and distribute the damn stuff. Evidently there is another similar brand with the same removable carrier backing carried by Freestyle maybe, but haven't found out which it is. Maybe the Hiromi person in Santa Monica, CA knows of a workable and removable backing as some of her papers are way down to 7 weight.
SG