"Gentle rubbing" refers to a soft and light movement of the hands or fingers on a surface, usually done to provide comfort or to help muscles relax. Full definition
Sometimes you can clear it with gentle rubbing or by putting a little bit of pressure on the area. (caringforkids.cps.ca)
Stimulate the kitten fairly vigorously with gentle rubbing until it begins squirming and crying; then allow the queen to finish grooming it. (texaswestveterinarian.com)
A distressed finish includes gentle rubbed - through treatment for a lovely vintage effect. (ashleyfurniturehomestore.com)