Originally Posted by Yooper
Or, grab a sample and cool it, and check with a hydrometer.
Something is very wrong with your reading. It could be an uncalibrated refractometer, poor efficiency, etc. But the lowly hydrometer is an excellent tool. Cool it to under 90 degrees, check the sample with a hydrometer and then report back with the reading and temperature and we'll help.
I got the same 10.10... At 80f.
Refract should be good as I saw proper readings with extract brews in the past.
I've sadly jumped the gun and added all the dme I had in the house (3lbs) brought it back to boil and am now rechilling it. The current og is 10.40 at boiling.
I didn't mill very well if I could look back over it, the malt may not have been cracked properly (banged it with a heavy implement..)
Despite me taking action already I'd love to hear better ways to avoid or fix it!