Scraping container Issues

One thing I have found to be difficult is the container used for bho, iso, whatever it is that involves scraping. a regular blade is straight but the most product I see left over is in the corners because they seem to dip down a bit and a considerable amount gets left in the pyrex if I use one.
Ive done the reducing a smaller container from a small mason jar down to a glass votive candle holder so that scraping has less surface area and I can catch it while it is still warm and make the best of my scrape. Anyone recommend a curved blade or tool to get around this?? Better method of scraping since it feels like I leave a bit of meat on the bone despite effort to make a clean scrape.

pyrex pan with rounded shoulders not hard corners. a pair of vise grip pliers and a box of razor blades its all you need

Yea i like pyrex, used to use a crock pot which also worked pretty great for cheap. On regular product Theres like a dab left over for me, not a big deal unless your doing real tiny runs and you need that dab..otherwise it mixes with another batch

I'm probably not as concerned about it as you think but wondered how people get creative. I've heard some folks using a pane of window glass that was thick but this was hedged on the fact that they didn't expect a pool of butane, rather a little puddle so they are small batches... No corners to get the stuff stuck but have gloves handy. I guess if I start growing and doing hash on a regular basis, this will seem like a no brainer and ill probably end up scraping from the one same dish for years.