How do I get past the five gnomes?

Hint 1 of 14:

If you haven't done so already, visit each of the islands.  You might find
some helpful objects in your travels.

Hint 2 of 14:

You need to trick each of the gnomes into thinking that you're not a man,
Each uses one of the five senses, and only one sense.

Hint 3 of 14:

The five gnomes will disagree as to your identity, but as long as they don't
notice that Alex is a man, you should be safe.

Hint 4 of 14:

Watch each of the gnomes to see which sense they will use.

Hint 5 of 14:

The next hints will list the general location of the item you need, and then
the exact object.  Do not continue reading if you do not want the answers.