On Aug 18, 2:43*pm, peter wrote:
I need to refresh some old yellowed wall tile grout - are those paint
pens any good or am I stuck with raking it out and re-filling?
Thanks

Hi Peter
I cleaned mine by spraying it with a bleach solution ,
approx 30% bleach, leaving it for 24 hrs and then rinsing off , It
removed what mould was there and all came up really white. Might be
worth a try before raking it all out.
Devonsteve