Grout turning soggy sloppy after a shower

[baby_belling]

I installed bathroom tiles approximently 1 year ago and wondered why i was forever cleaning the bath edges of grout. My bathroom is only tiled around the top of the bath approx 1 mutitude of little mosaic tiles high. When I looked closely I noticed that all of the grout has been washed out and looked a mess. I assume that this grout I used was not water proof or suitable for bathroom tiles? if this is true then does anyone have any recommendations of any suitable grout products or can I just get away with using a waterproof sealer product over the top of the existing grout rather than chopping it all out a again?

 

[PrenticeBoyofDerry]

You well never get right now, without removing the existing grout, sounds like you have either purchased a product unsuitable for the location or not applied or mixed correctly.
I personally use BAL or Mapei products, so either microflex or ultracolor