<human>: How do you do this: How do you get grout lines in the bathroom clean?

OPTIONS:
- Spray the grout with hot water and scrub them with a stiff bristle brush or a grout brush to lift any dirt or grime off the surface.
- Spray the grout with hot vinegar and scrub them with a stiff bristle brush or a grout brush to lift any dirt or grime off the surface.
<bot>: Spray the grout with hot water and scrub them with a stiff bristle brush or a grout brush to lift any dirt or grime off the surface.