Squirt’s good a lot of the time but I found occasionally it’d just disagree with some flavour of mud and totally shit the bed, which was pretty annoying. Not often mind but often enough. So I ended up only really trusting it in summer but when it’s good, it’s great.
Seriously, if you’re into wax lubes do consider the putoline. It’s expensive for a tin to start with but I’ve no idea how long that tin lasts- years, anyway. So over time it’s going to work out a fraction as expensive as other lubes. It’s an enormous faff to apply but it needs done less often (*), and it keeps your chain working better than anything in bad conditions so basically you’re trading a bit of extra faff, for better drivetrain performance and lifespan. It does leave a black coating but it’s not ugly like, say, finish line black slime, it’s just- well, it’s a black wax.
(* when I say faff, I mean do it wrong and you might set yourself on fire levels of faff. But I love that I can go and do, say, a manky scottish winter enduro and just not worry about the chain, even that time the frame blocked up so badly that the chain was literally running through a mass of mud, round a chainring that was encased in mud, then through a mud chain device)