On Thu, 30 Jun 2016 14:07:21 +0100, Adrian Caspersz
wrote:

On 30/06/16 13:58, Adam Funk wrote:
I've been working on tidying up the grout in the shower by applying
thick bleach with a paintbrush, leaving it for a while, then rinsing
it off. I'm wondering --- would it be more effective if I made it
even thicker so it stayed in place better, & what is a good way to do
that?

Scrap that.

HG Mould Spray - £3.99 free delivery
https://www.amazon.co.uk/HG-18605010.../dp/B000IU40HQ

Works very well!
+2 excellent stuff, as is their scale remover