Do you have a light coloured carpet? Do you have darker areas in front of sofas and chairs? Do you or your family sit with only their socks on? Are those socks cotton rich and dark coloured?

If your answer to the above is yes then you are probably suffering, in part at least, from dye transfer from the socks.

Our feet are moist and warm which can allow the dye from the cotton rich part of the socks to migrate onto the carpet pile as you move your feet over the carpet. Worst offenders are are young boys wearing sports socks and with restless feet.

Try to get them to wear slippers or indoor shoes to stop this happening.