I don't think this is quite right. Mine are heavy, but easy enough to slide.
Perhaps try to pull the lever up with your left hand but use the metal handhold (drawer front) to do the actual pulling or pushing??
Thanks SteveR and SteveB
Have used SteveR’s suggestion
Your replies give me more ammunition when talking to MB who have not been very helpful over this issue
Do either of you use any sort of lubrication on the runners?