>>>> gently brush on the mesh<<<<<

> No. Brushing will injure their feet. Spray.

Actually, my advice would to do neither.  Put them into a hive with a comb 
of honey.  STAT.

Don't have a comb of honey and pollen?  Good luck.  Then feed the hived bees 
sugar water any way you can.

The many ways to feed have been covered in excruciating detail here and the 
discussions are freely available in the archives. 

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