Shower sealant

[sbar]

Hi,
I painfully removed all the silicone from my bath a few weeks ago (took hours), and replaced it. However one of the sections is done really badly (as it was my first time of doing this) and I dont want to have to remove it all and start again when the rest is fine. Can I remove this section with a stanley blade and just replace this section? My concern is that it is in the bottom of a shower so will have to withstand a lot of water, and I'm not sure a patch up job will suffice. Any advice is greatly appreciated as I don't want to waste time starting over.
Many thanks!

 

[opps]

if you mean that half of a straight run is bad then you can remover that and refill. You might end up with a slight step though. If this is the case you might want to run silicone over the whole length again. making sure that the silicone is dry and clean