@Wayne-TP Anyone suggesting that you tap them on a table to release the relay is giving you suicidally dangerous advice. A relay that is sticking is a relay that can't be sure to turn an electrical...

@Paul_Aldro011 You are 100% correct. I have bought about 15 of these (P100 and P110s) and have been using them for about 4 years. Every now and then I had to send another one back which had had a...