Are you struggling with double stops?
1. Don’t use extra pressure, just get the angle right.
2. Alternate between single stops and double stops.
First practice just alternating between D and A strings:
D0-A0 with peri-diddle
Then practice alternating between separate bows and double stops:
Repeat on other strings and with more complex double stops (adding rhythms, fingerings, longer phrases).
Repeat a thousand times
You have practice double stops a lot each day. There’s no shortcuts to mastery!
Here are some double stops exercises on open strings:
Here are some in which you add first finger:
Go fiddle with it…