Frank Erskine wrote:
sometimes the hole will be filled with dust and bits of brick/plaster that
just restricts the bolt from going in, try running the drill for a few
seconds after you drill the hole and pull it in and out or use a hoover on
it.

Many years ago I bought a rubber bulb from Hilti for this very purpose.
It had a thinnish plastic pipe attached which you simply poked in the
hole and blew the swarf out.

A large bendable drinking straw does the trick.

Large and bendable so the dust doesn't come right back at you... and
remember to blow, not suck.


--
Ian White
Abingdon, England