Floating Sponge
Swiping a damp sponge helps manage the moisture content and paint load on a paintbrush, allowing artists to control "floating" color (watery paint) by absorbing excess liquid, creating a consistent moisture level, and preventing heavy, uncontrolled drips.
It keeps the brush damp enough for smooth application without overloading it.
Wash the sponge out often to prevent mold/mildew