drop down menu arrows

I am using this css for drop down arrows. how ever now when I have sub-sub menus I get two arrows, one going to the side (that’s the one I like) and then I have a down arrow just like the one on the top menu. How can I make it so the down arrow is only on the bar and not in the submenu. you can see it here here

`.nav li > a:after {
color: #29a8c6;
content: ‘ ?’ !important;
}
.nav li > a:after .active > a:focus {
color: #ffffff;
content: ” !important;
}