I haven’t had this problem, but I would try to solve it with a lab grade detergent suitable for plastics.
Lab grade because lab stuff has to work to spec, and there is hell to pay if it doesn’t. The Big Boys rely on those specs, and they have corporate lawyers aplenty.
So I align my interests with theirs. VersaClean from Fisher Scientific is one such product, and it is also recommended for ultrasonic, where it works a treat.
Of course, if you want your records to smell as fresh as flowers, and don't mind soap film, then by all means use dish soap.
Lab grade because lab stuff has to work to spec, and there is hell to pay if it doesn’t. The Big Boys rely on those specs, and they have corporate lawyers aplenty.
So I align my interests with theirs. VersaClean from Fisher Scientific is one such product, and it is also recommended for ultrasonic, where it works a treat.
Of course, if you want your records to smell as fresh as flowers, and don't mind soap film, then by all means use dish soap.