More care related problems regarding my 92 year old mother .
I've taken to changing the water in her denture bath ,replacing with a steradent tablet and fresh water but have never really got involved .
This week she says her mouth is sore and that the lower plate has a " sharp edge " .
Dentist today says it's dirt
and spends some time cleaning them .
What I thought was a hole ( yellow raised bit with black in middle
) now removed .
But I can feel with my fingers that there is still some rough residue remaining .
How can I remove it ?