Closed Catalan

Recently I've taken up the catalan and I get pretty playable positions with the open catalan, but if black doesn't take on c4 we get the closed catalan positions and it seems very difficult to prove an advantage.  I must be doing something wrong as the open catalan is supposedly better for black than the closed.  So how do you deal with the closed catalan? 

~Thanks in advance

avoidance.

 well i'm playing catalan setups, so I can't really avoid it.  I just need to find a good response to it.

Develop and smash through with e4. Either that or let Black smash himself.

 do you have any sample lines?

try a g pawn push followed by a rook lift and swing the rook over to the h file.  The mate threat may induce g6 weakening the dark squares around the king.