In my game I would like to have spikes come at the user and the user has to jump over. But the clones are not killing him and resting. This is my script.

when I start as a clone
wait (0.1) secs
go to x: (208) y: (3)
glide (1.5) secs to x: (208) y: (3)
wait until <touching [edge v]?>
if <touching [sprite 1 v]?> then
broadcast [Player dead v]
broadcast [Game over v]
stop [This script v]
    
end
    
hide
delete this clone
end

Can you please tell me whats wrong.

Sorry that last block should not be there and the “hide” and “delete this clone” are connected

wait until touching edge will do just that! Only when it gets to the edge will it then start the blocks to detect the player, but that will run just once.
Change to wait until touching edge OR touching sprite1

Scratchblocks aren't working in IE at the moment so cannot write them or read the scripts properly either. Just noticed that you use glide so there is no need to use touching edge so remove that and just wait until touching sprite1.

Instead of broadcasting ‘player dead’ you can put

when green flag clicked
forever
    
if <touching [spike v]?> then
    
broadcast [you lose v]
end
hide
end

in the script for the person.

I don't know if this will fix or even if it's better than your first one, but it might help.

I have that but that doesn't have the clones kill him.