Well the only other suggestion I could come up with would be to get more tanks. Then put your favorite liquid in each tank so that you don't have to clean out the tank / coil every time that you want to change the liquid, just use the tank that has the liquid in it that you want to vape. Sure it's a bit pricey up front having to buy multiple tanks but it alleviates having to clean out tanks and coils all the time that you wish to keep changing liquids.
I've made the assumption that you are cleaning the tank and coil because you changed liquids, else I wouldn't bother to change / clean the coils/tanks myself.
I primarily just keep 4 (or maybe it's 5) tanks laying around with the liquids that I vape all the time. a couple Nautilus tanks, AeroTank mega's, Protank 2 with the addon bottom adjustable air control, and an awful iciga ninja tank. But I'm one of those folks that doesn't like to vape on the same liquid all day long, so I'll pop on a different tank multiple times each day. I'm sure if I only had one Nautilus tank I'd not be nearly as happy with vaping if I had to vape the same liquid all day long.
When I first started vaping I only had the one protank 2 and hated vaping one liquid all day or changing out the coil and cleaning out the tank a couple times a day to change liquids so off to the store I went to get more tanks.
Oh and it's just so much more convenient to me to carry around a spare coil head in case there is a problem with the ones I'm using in the tanks that I take with me instead of having to rebuild a coil on the fly if something goes wrong with it. But to each their own. I've read of people that can build a coil with their eyes closed, personally I don't have those mad skillz.