Had the exact same thing happen to me in my last house. PVC under the slab is a ticking time bomb, especially if you have any shifting soil. I'd add that you should also check your water heater's pressure relief valve and make sure it's draining properly - high pressure can cause those slab pipes to fail faster.

A little spray bottle with alcohol works great for a quick clean between clients if you're in a rush! I keep one right by my station and just hit the blades after every haircut now.

Oh man, @abbyp61 that weatherman story is too good. I had a friend who worked at a local station too and one time the anchor's mic went out during a live segment and she just kept talking for a full minute with her mouth moving but no sound coming out. The director was so flustered he just let it ride because he didn't know what else to do. By the time they cut to commercial she was bright red and the whole crew was trying not to laugh in the booth. It's amazing how much chaos goes on behind the scenes that nobody at home ever sees...

That thing about Roman concrete is actually the key here. Nobody talks about how those old structures used seawater as part of the mix, which created a totally different chemical reaction than modern Portland cement. Makes you wonder if we overcomplicated everything with all our fancy admixtures when the simple solutions already worked.

Oh man, I've been there! Listen, I've tiled three bathrooms in my own house and a buddy's kitchen and let me tell you, that corner where the wall meets the floor is a nightmare every single time. I don't care how perfect your layout is on paper, once you get the tile down it never lines up like you planned. The Schluter strip is a solid fix but you gotta make sure you get the kind that's meant for floor to wall transitions, not just the one for wall corners. I learned that the hard way when water seeped behind it and bubbled the paint. If you dont wanna mess with metal, a good color matched silicone is your best friend. Just tape off a straight line, run a bead, and smooth it with your finger dipped in soapy water. It'll look like a planned reveal instead of a mistake. The hexagon floor hides a lot of sins anyway so dont beat yourself up too much.