I have a tile patio with 1/4" grout lines between the 16" tiles.

In a few places, the grout has cracked and disintegrated, probably due to
thermal expansion.

Prior to replacing the grout, what is the best way of removing the remnants
of the grout from the spaces between the tiles.

Somebody suggested the HF Multifunction Power Tool ($ 19.99). Would this
work? Any betters suggestions?

Thank you

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