On the topping up w sealant point - is there any need to pull the tyres off and wipe out the old dried sealant before doing so? I have a worry about the old sealant adding weight, as if it's c.30ml a pop then (unless it all pisses out through flats), won't it be building up inside?
You are kind of supposed to clean them out periodically but who's got time for that. If it's an everyday bike then there's not much scope for buckets of the stuff congealing, unlike say a summer bike that's been hung up for a few weeks.
On the topping up w sealant point - is there any need to pull the tyres off and wipe out the old dried sealant before doing so? I have a worry about the old sealant adding weight, as if it's c.30ml a pop then (unless it all pisses out through flats), won't it be building up inside?