The last few years I have been using belly strips from white perch. When the perch are hitting good they work awesome and they last and last. This is a trick my Dad taught me that he used when they ran out of bait back in the 60's although he used strips of perch belly. I on;y take enough bait to catch a white perch and I am set.

That's all I use any more, even when I tip Swedish pimples through the ice. Eyes work good too.

My 2 cents.