[Pruinose]

1 warmup set + 2 sets to failure not working.

I try to do 2 sets to failure but if I get 12 reps till failure on my first working set I cant even get 1 on my 2nd set. What should I do?

 

[HellYeah]

Despite not knowing, what exercise, I would train less reps in more sets and progress to failure.
Maybe like this:
6-6-6
7-6-5
7-6-6
7-7-5
7-7-6
Rest day
2 sets to failure tryout
Repeat, starting with 7-7-7 or 6-6-6-6 and so on ...

Just an idea from a non-professional with minimal information about you and your goals...

 

[Diego1978]

After selecting the load that allows you 8-12 reps, i recommend you try doing:
set 1 of approach with 8-10 reps, trying not to reach sfatture
set 2 of failure using the same load until you can no longer complete the concentric phase.