Does grout go off ?

[Daviesmith]

Hi , 2 years ago I used some ready mixed wall grout and I had half a tub left over. I'm now thinking of redoing the grout in my shower . My question is should I buy new grout or will this stuff still be ok ? I've opened the tub and it's still soft
Thanks

 

[lostinthelight]

Whats the reason your having to redo after 2 years, it seems a very short time. Unless there are good ones, that should tell you you something about the quality of what you've used and to ditch it in favour of powdered grout

 

[Daviesmith]

It is evo-stick adhesive and grout . I was going to replace the grout because it had some black bits on it but some bleach seems to have cleaned it