If it's smearing, change cloths.
I keep a lot of torn up T shirts in an binbag - use them once, then throw them in another binbag to be washed later. Funny though - Now that I don't have a black car any more, the rate of use has come down to 10% of what it was :-)
As for paper Vs cloth - I still say cloth aborbs more dirt.
Slatts