LOL, seriously, I
am a chef, and.....
I add plain flour. It helps to stop it melting so much. If it's crumbling, it sounds like there's too many oats or seed
All is not lost. Warm your mixture again, gently.
add a little more fat and a good amount of flour. Sorry I can't be more specific, I don't know what quantity you have.
Here's basic my recipe
500g Dripping/Lard
1 Tablespoon Peanut butter
3 heaped Tablespoons Plain Flour
500g Rolled Oats
500g Bird seed/ Sultanas/Raisins or anything that won't go mouldy.
Leave to cool at room temp. (Tricky with this heatwave) Form into balls before you chill it. An ice cream scoop, the old fashioned sort with a spring is good or just get your hands greasy
Chill after forming into shapes.
I know some people fill empty kitchen rolls and tear the card off after it's chilled. I couldn't be bothered with that lark.
Have you ever seen the horn shaped baskets which come filled with bird cake? I refill them several times. I just scoop it in at room temp and press it in. I store it in bulk in old ice cream tubs or such like.
To be perfectly honest. I think that once you have rescued your mixture, you should freeze it for use in cooler weather. I have gone from getting through 1.5 times my basic mix per day, a few weeks ago, to just putting out bought fat balls every couple of days.
Just reread your post. Sorry, you are making blocks. Yes, follow remedy and squash into the containers then chill.