when i was much heavier 90-95kgs at about age 24 i was always able to press 100kg every workout but after watching some louis simmons and dave tate videos about benching, i have cleaned up my form and i'm paying more attention to the details.
only now that i'm starting all over again, i figured out that there's nothing really magic to getting stronger. you just have to be patient, train smart and keep adding weight to the bar in small increments. i'm pretty certain i'll be benching 100kg with ease by the end of the year.
definitely check out some louis simmons and dave tate clips on youtube about bench press.
thanks mate, all the best to you too