My light-ish coloured carpet has got black marks on it, and I don't know how to remove them. They're from the small, felt-like pads on the base of an item, you know the ones used to cushion the base and stop it from scratching a hard floor. Well, we've just moved the box, and found that the pads have kind of disintegrated and we've now been left with sticky black bits on the carpet where it was sitting. I've tried scrubbing at it, and have tried normal detergent, but it hasn't made a difference. They're quite noticable against the colour of the carpet, and other than maybe using scissors to cut off the tops of the affected carpet tufts, I'm not sure how to remove them.
Can anyone help/suggest something to try?