Hello, I work for a container factory where re-used bottles have a lot of tiny glass splinters. Inspired by the standard experiment of picking up glass splinters using a comb, I thought I could insert a charged rod into a bottle to attract little splinters towards it. To get similar voltages as a comb, I bought a small tabletop Van De Graaff generator. I took a rod, connected it to the VDG sphere, and tried placing a few splinters close to it. The splinters don't seem to get attracted to the rod in any consistent way. Some of them 'orient' themselves towards the rod, but don't move towards it. Some touch the rod and then repel. I don't know how to proceed from now - could anyone please throw some light on this? My ultimate aim is to get rid of the splinters in whatever way possible. I'm new here, so please let me know if I should re-post this in a more appropriate sub-forum. Thanks a lot in advance!