Bit of background here sorry its long, live in a semi detached house in a nice street. Never really had any issues with the other residents in the street personally. My issue is this our neighbours have at least 10 cats - a mix of outdoor and indoor. My mother takes real pride in her gardens - grows all her own fruit/veg in greenhouses etc. and has loads of lovely plants in the front garden.
Next doors cats are constantly ripping up her flower beds, shitting all over the place (including the front door step and all over the drive way) and just generally being a nuisance and ruining the garden/drive way/front of the house. Normally as animal lovers we would just put this down to animals being animals and get on with it - however the husband is constantly out in his drive way washing his car (weirdest hobby ever, I'm talking even in the rain) he sees the cats go into our drive way and shit all over the place, actively watches them do it and does nothing? the wife is a nosey fecker and plants herself in front of their front window all day long which you guessed it looks right onto our drive way - she also watches her cats shit all over the drive way and ruin flower beds.
Does anyone have any tips on what I can do to maybe deter the cats from using the front of my home as a giant litter tray? funnily enough they don't do it on their own property
Any sprays I can put down that the cats won't like? or just tips in general? I don't want to harm them in anyway so nothing like "rat poison and bleach" as one person previously suggested. Talking to my neighbours about it is out of the question as they are very stubborn and quite nasty at times from what I've seen/heard with other neighbours (most of the street just pretend they don't exist in a bit to live peacefully) and I don't want to create any issues for my mum as a result.
Any help would be appreciated :)