over the last 3 weeks i have found 5 clusters of black dots. they look exactly like someone has taken a black pen and just done a cluster of between 20-30 dots. so far i have found a cluster, on ds1's pillow, on ds'1s bedroom floor (lino), on the hall floor (laminate), on the leather sofa and today on the cofee table. i know it wasn't ds as he wasn't here today to do them on the coffe table. it isn't ink, they washed off the pillow, sofa and both floors and i have been able to scratch them off the coffe table. what the hell are they?