Use a syringe with a filling tube to dip the tyre and check the level and condition of the sealant (the Milkit system makes this so simple), add enough sealant to bring the volume up to a bit less than first time. Check every couple of months, or whenever you start worrying about it. Remember punctures from thorns aren't a problem, flats are, so it doesn't really matter how many you have. By the way I check for thorns every few rides and pull them out, rotating the tyre till the sealant fixes it - better a problem in the comfort of your own home. I rarely pull out thorns on the trail. Don't remove the tyre until you are going to changed it, getting old sealant off the bead is a PITA. Storing (I prefer "resting between rides" ) with the valve at 6 is ok, the sealant will pool in the bottom of the tyre.Assuming I were to go tubeless and assuming I get nothing more than a couple of thorns each year, what maintenance is required? E.g topping up, or do I need to clear out the old sealant every so often. And if I’m topping up how do you know how much to put in each time and when.
Also do you have to be careful not the have the valve at 6 o’clock each time you store your bike in case the sealant gums up the valve?
sorry for all the questions but I’m considering having a go at this when I next get some new tyres. my currents ones have seen better days and and have been punctured loads of times. The beads don’t look too healthy either due to constant removing to fix punctures.