It depends on who you are addressing. Some Muslims will reply with Wa Alayk if they know you are non muslim. More or less the advise that was given was that when a non muslims greets as such then you should reply wa alayk. This is due to the fact some people like to be snide or make fun of Muslims and the greeting. Some will reply with Wa Alay Kumus Salaam. The easiest thing to do in order to avoid any situations is to use common Arabic greetings instead of "As salaamu alay kum".
JBH,
It depends on who you are addressing. Some Muslims will reply with Wa Alayk if they know you are non muslim. More or less the advise that was given was that when a non muslims greets as such then you should reply wa alayk. This is due to the fact some people like to be snide or make fun of Muslims and the greeting. Some will reply with Wa Alay Kumus Salaam. The easiest thing to do in order to avoid any situations is to use common Arabic greetings instead of "As salaamu alay kum".
Act your age not your shoe size