Im so sorry that no oneelse has responded to you.
Apologies for my delayin replying, I only just came online and saw your question. Are youstill looking for help with this?
Please don't rate myanswer until we have explored all possible avenues. Please just usethe reply button to contact me.
This may ahve a build up of lime scale
Do you live in an area with hard water? If so, have you descaled this recently?
Thanks for letting me know
All the best