Disclaimer: this advice is only for Lizzee and Shurshishka. Do not copy this advice or use it for your kitty.
As Susanne said, you always want to do increases and decreases on SLGS in 0.25u. We don’t “shave” doses. But, it’s going to be a challenge to reduce her to 0.35u and draw that consistently without calipers. My suggestion....on a one-time basis...is to just reduce her to 0.5u and get back on a line.
My thought process is that she didn’t drop much below 90 and you are using a pet meter. In this one case, it is fine to just reduce to 0.5u because to take her all the way down to the next easier line....0.25u...might stall her progress out too much and then you’d have to wait a week to take her back up. Conversely, if you put her on 0.5u and she earns a reduction, then you can take her to 0.25u.
How does that sound?