Since completing their group stage campaign of Europe's premier club competition on December 11, the Hoops have won six league matches in a row without conceding a goal which suggests to Forster that they have not suffered any ill-effects from a domestic viewpoint like they did last season.
"We've not been at our best over the last few weeks but we have ground out wins, which is the most important thing at the end of the day - picking up the three points," he told CelticTV.
"If you can perform well it's an added bonus and we have been pleased to keep the run going. We are high in confidence.
"We have picked up a lot more results following Champions League games than we did last year, so we have better experience there.
"Although we were disappointed by the Champions League, there was less of a hangover after it.
"We are a year older and a bit more experienced, obviously off the back of last season when we played Champions League games and then went into domestic games.
"Everyone has done well and contributed."
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