Replacing silicone sealant

Hi I’ve had a tradesman come round to replace the silicone sealant around the base of the shower which is about 120cm. He says it will take quite a long time to do (1-2hrs) because it’s always hard to remove the old seal. Is that correct? I thought it would have come off quite easily so just wanted to make sure that’s correct before he comes. Thank you

 

Could you post a picture Hayley please

 

This is the strip that needs replacing

 

If the old silicone could be removed easily it wouldn't be doing it's job, horrible job, usually.

 

I'd say he's right. Can take over an hour to remove old stuff.

 

You’ve all put my mind at ease so thank you everyone I’ve got it booked in for Friday