I use a Dawn soap and water mix (sparingly) most of the time from a spray bottle, but I've tried WD40 as well. We sometimes only get a couple hundred miles on our tires anyway and sometimes as much as maybe 800 miles and then they're worn past where we want them, particularly the rear tires. Soap and water has been working just fine for me for over 30 years of riding, most of which is off road. Our family alone goes through ~12+ tires a year, not including the tires I change for friends and other people and I change every single one of them myself. Maybe using the gels and special soaps are easier and I'll have to give them a try sometime, but I've got a system that's been working quite well for me and I have no complaints, especially when I see other people struggeling to change their tires when its just not that big of deal for me whether its a Maxis IT or a D606 or a Kenda Carlsbad, etc.