5 Colors Waterproof Tile Floor Marker Pen Wall Grout Pen for Kitchen Bathroom Ceramic Seam Paint Gap Repair Tools

The rod is too thick, it doesn't get on the grout. And where it does, the rod simply smears the grout on itself. But it doesn't paint over it. Where should I put this crap now?

Everything arrived on time, whole, sealed in cellophane. No damage. Thanks to the sellers and to Joomall, a happy new year. Peace to all.