That's the thing, always remove excessive adhesive at the time because it's just so much more easier in the long run
. I've done it many a time with wood filler; been so keen to carry on whilst thinking "I can just scrape it off later", but unfortunately, I always ending up wishing I'd done this sooner. Infact, there is some excessive PVA on my bath beading and it's turned black. However, removing PVA from a surface such as enamel, porcelain or ceramic (the glossy side) is quite easy because of the way it adheres to the surface.
To be honest, I don't think you will have to start again by removing all tiles etc. Perhaps just rake out the top layer of grout and refill. But, before doing this, try and remove some of the excess adhesive first.
There is a tool to use, but I'm not a tiler
, so I can only presume the name of the tool is a 'grout rake'. It looks like this:
However, the one I'm thinking looks like that, but has teeth instead of just a flat blade.
Please could someone with tiling experience check over my advice to ensure that it's correct.
Thank you.