If your opponent cannot do anything active, then don't rush the position; instead you should let him sit there, suffer, and beg you for a draw.
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[Event "rated untimed match"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "Unknown"]
[Black "Unknown759"]
[Result "0-1"]
[Annotator "David Hayes"]
[BlackElo "0"]
[FEN "4r1k1/1b3pp1/4r2p/2P1b1q1/8/P2B2NP/1P1Q1PP1/3RR1K1 b - - 0 1"]
[SetUp "1"]
[TimeControl "0"]
[WhiteElo "0"]
1... Bxg3 2. fxg3 Qxd2 3. Rxd2 Rxe1+ 4. Kf2 { Black wins with a large
material advantage. } 0-1