I know this thread is 4 weeks old, but the info may help others.
I had the same issue two years ago, swearing and cursing renault for having wiper arms that dont lift enough.
I just had to replace them again, putting it off longer than I should, dreading the fiddly bloomin job!
Anyways, I found out about Aero wiper blades, (a new design, see pic), that used an ingenous way to connect to the arm, you open the flap, slip the arm on and then close the flap. I bought them and fitted them. Took me 8 mins with no need to remove arm, but 7 1/2 mins was spent removing the old blades!
These blades dont cost the earth, (got mine from
for £11 inc postage) and fit very easy. They are also bery good blades.
the b****d job to replace laguna 2 wiper blades is a b*****d no more.