I need some help! My balcony cement is getting really grotty and I don't know how to clean it in a quick and easy way without any water pressure.
Welcome to the Workshop community. It's great to have you join us. I hope you find the site useful and look forward to hearing about your projects.
Sorry to hear about your concrete. As its porous, it certainly can be difficult to keep clean. Can you tell us what is staining the concrete?
You could try white vinegar and a stiff brush to give it a scrub first off and if that doeasn't work (depending what it is that's making it grotty) 30 Second Outdoor Cleaner is good.
Any chance you can polish the concrete?
Here's a before and after example of some stained concrete that's been polished.