How to remove scotch tape brown residue from album covers

I prefer Bestine---created to dissolve rubber cement---over Goo Gone. I use it to remove the glue left by the price stickers I remove from used LP covers. It doesn’t stain the cover as Goo Gone sometimes does. It's sold at art supply house (and of course on Amazon).

As for inner and outer sleeves, check out Vinyl Storage Solutions in Canada. The new standard in LP protection.

IF the adhesive is crunchy, GENTLY drag a new single side razor over the top to RAKE not cut the adhesive. Don't drag the whole surface at once. Drag OFF the cover, not ON to the cover.

If it is softer,

Like the guy said, peanut butter (OIL) is a good softener. Just about any type of oil will work. Work quick, a little dab will do ya. Dip a Q-Tip in baby oil, 3 in one, or what ever you pick.  Work the spot with the Q-Tip and wipe. It's better to treat more than once than over do it and have the oil penetrate the covers ink and then into the paper product..

If you get it down to a science, then wipe the corner once or twice with a little isopropyl on a toilet tissue, ONCE or TWICE, no more..

Just so you know, what mechanics are really good at (IF they are worth a hoot) CLEANIG THINGS... 3/4 of my time was cleaning things so I could fix them...GROUT and drilling MUD.. Wonderful to clean..

The best way to remove those ugly stains is with a scissors.

Magic Eraser; Good-Off; Goo-Gone or lighter fluid