Muñoz, that finally was selected as the first-choice goalkeeper, due to his good performances in the field, after conceding only one goal in the playoffs, that meant Wirth was the second-choice goalkeeper of Colo-Colo. In January 2008, Wirth played the friendly tournament City of Osorno, playing very well in the 2–2 draw with Unión Española, saving three shots in the penalties. Despite of that, Wirth not started in the first week of the Apertura Tournament against Provincial Osorno. In the fifth week of the tournament against Rangers, Wirth was started in a 2–2 draw, in where he conceded a goal to the forward Lucas Palma in the last minute of game. After the surprise resignation of Claudio Borghi as coach, who led Colo-Colo to important victories, Wirth was starter in the first game of Fernando Astengo as coach, in a 2–1 win over Deportes Antofagasta, in which he also saved a penalty, but in the repetition of that for overtaking of Wirth, he failed to save the penalty and conceded a goal in the victory. He again started in the two last weeks of the regular phase against Cobreloa and Cobresal. After the penta-championship loss against Everton, the coach Astengo was fired and arrived the former footballer of the club, Marcelo Barticciotto, who only used to Wirth in a Copa Chile game against Fernández Vial, that Colo-Colo won 4–2. After his lack of games in the season, it was reported that Wirth would no longer be part of the plans of Barticciotto. Municipal Iquique On 29 December 2008, it was reported that Wirth and Cristobal Jorquera would join Municipal Iquique. The next day, it was confirmed that he joined Municipal Iquique along with the Argentine striker Cristián Campozano. The keeper arrived to the club on loan. On 9 January 2009, he traveled to the city of Iquique and joined the club training. On 29 January, Wirth debuted in a 4–0 defeat against his former club, Universidad Católica. The next week, against Curicó Unido, he played very well in a 1–0 win. On 13 February, for the third matchday of the tournament, received a free kick goal from Jaime Riveros in a 1–0 defeat with Everton, but in the next game, Wirth kept a clean sheet in a 3–0 win over Palestino. In the sixth week of the 2009 Apertura Tournament against Universidad de Chile, he played very well in an