Touche
@noblehead !
I was going to say the same thing: how do you know it's your lantus that's wrong? Run several basal tests over the next fortnight just to be doubly sure and then consult with your DSN and post your findings on here to get the range of input you'll need to properly resolve the issue.
As far as Lantus goes, it may work for you or it may not, but if you suffer soreness, lumps, stinging etc., when you inject it whilst not getting the same issues with the Novorapid (do exclude cold-insulin if you keep yours in the fridge!), then it's possible you have an intolerance to one of the ingredients in which case you need to explore alternatives.
But also do consider Berstein's point about quantity of insulin delivered per injection: his mantra is no more than seven units before you run the risk of your body's immune system reacting to an invasion of an unwelcome visitor.
Perhaps try basal testing as per the link
@noblehead included and then perhaps do some using Bernstein's multiple injection process for your lantus dose (e.g. four injections of 7 units in quick succession but in different sites).