Now that you have slime in your Tubes , make sure you carry spare valves . I have found it gums them up .Had a puncture yesterday in a virtually new marathon plus front tyre
In the middle of the forest on a cold,rainy,foggy morning.
Luckily I always carry a spare tube and a full set of tools including some Co2 canisters so a fairly quick fix.
I found a thorn in the tyre right in the centre and managed to pull it back out with sidecutters.
When I got home I put half a bottle of slime in in the hope it won't happen again. I already put the other half in the rear tyre which I had fitted just last week so hopefully it won't happen again at least until the weather improves.
I will still carry a spare tube though as slime has let me down once before with another thorn that it should have coped with easily. I also carry some scabs in case I get another puncture after replacing the tube!