I think I just made soap back in January... but I was nearly out. Maybe, I just use too much as sometimes I try to pretreat the stains by using the soap and then I put the regular amount in. I add a glug of vinegar to the wash water and the rinse water if I make it in time for the rinse. Maybe I should also add the washing soda to the wash (even though it is in the soap) I used to, but thought that it didn't matter. and maybe skip the initial glug of vinegar.
any thoughts.