do you wheelie? there is two parts to the fork prior to dissemble. the dust cover and the seal .... you can loosen the dust cover and slide it down the stanchion, i would do the same thing you did clean everything and I used electrical contact cleaner aerosol can to clean and wipe because it is pressurized and you can use the straw to reach in the crevices where the dust seal sits. clean everything real good and wipe clean with paper tower that does not leave pieces behind and do the trick you did with the card to clean the fork seal. Put some weight on the bars and compress the forks then repeat. If it is just grime and the fork seal still good (not cracked or ripped) there should not be any more oil coming out otherwise is time to change the seals. a little strip of cloth tied around the bottom of the fork stanchion will absorb the oil if its leaking a bit and you can ride it until you do the service. might take a few tries cleaning and compressing but you definitely need to service as your brakes could be compromised if oil gets in the rotor. When my seals needed service and sent them to racetech for a fork internal upgrade, some of the best money Ive spent on the bike.