let's say, it's been a couple of years that I have no problems with the corona (LOL) .. maybe because I replace it when it is not too old (?) if that...
you can try an old trick, to make sure they are really those, give a nice brushstroke of bleach / liquid concealer, on both blocks, even inside, and...
try to check the one-way bearings of the roller pressure drive unit, there is a gear in the fuser compartment on the right, disassemble the pressure...
HELP US KNOWING THIS: the Italian people are about to be crushed by
a government of dishwashers and ex-DJ alternates, unelected, that with the excuse of covid 19 is applying a communist dictatorship of the worst kind !! not even in chile or nicaragua !!
KNOW IT ALL!