"The best way to clean a ceramic straightener is to turn it on and let it heat up, then turn it off and while it is still warm wipe over the ceramic plate with a warm cloth. This will remove any product build up but be careful not to burn yourself!!"
Hi nessie
Wipe the blades when they are warm with shampoo on a wet cloth. Don't let the plates go cold or any hair products that you have used will be stuck to them.
You can also use washing up liquid. Watch you do not burn yourself though.