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That stuff is amazing! I don't have a cooker hood and always get a build up of grease on the cupboard above the hob and had tried all sorts of sprays from top brands like Flash etc that didn't touch it. My sister got me some elbow grease and I thought it would be useless, but it just wiped the grease away like it was nothing.

Saying that, elbow grease and glass cleaner are different products with different jobs in mind.

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Best cleaning product I've ever used.

I'm a decorator. Ceilings in most rooms are often painted with basic paints which offer little in the way of water resistance. Thus a bleach solution like this would soak into the ceiling & cause discolouration.

Bathroom & Kitchen ceilings are different because paints that ought to be used are necessarily formulated to resist water or grease. A Mould Remover spray will just sit on the surface of the paint & do its job. That said, it is bleach, so be sure to protect eyes, clothing, carpets etc. Also, don't use it often as bleach will eventually eat away at paint, grout, sealants etc. Also, if I may, I buy 'Astonish Mould & Mildew' for £1 at places like B&M and Wilko's, it works just as efficiently. Spray, leave 5-10mims, clean off with water (clean off the bleach, not the mould, that will just dissolve), repeat if necessary. No need to scrub.

If you need to get it off a ceiling that is at risk of discolouration, allowing for common sense precautions given that you would be spraying bleach, I would still do it. Mould can be harmful. Then perhaps look at some sort of ventilation to help alleviate the problem & also think about repainting the ceiling with a better quality paint with mould resistant properties.

Edit: poster above makes a good point, test it on a small area first (edited)

But it stinks

It’s probably the wipers that have grease on them too, so when you use them the screen goes blotchy. You need to thoroughly clean them too (although probably best not with glass cleaner).

This will probably be a bit too harsh for a laptop or TV screen, it might damage the screen coating. You’d be better off with a mild alcohol based cleaner, something designed for an lcd or led screen with a microfibre cloth or screen wipes

Just used white wine vinegar based on this comment and I really regret it