diff --git a/contrib/signet/miner b/contrib/signet/miner
index 09eb07502f..f1360818ae 100755
--- a/contrib/signet/miner
+++ b/contrib/signet/miner
@@ -528,7 +528,6 @@ def do_calibrate(args):
 
     TRIALS = 600 # gets variance down pretty low
     TRIAL_BITS = 0x1e3ea75f # takes about 5m to do 600 trials
-    #TRIAL_BITS = 0x1e7ea75f # XXX
 
     header = CBlockHeader()
     header.nBits = TRIAL_BITS
@@ -536,23 +535,14 @@ def do_calibrate(args):
 
     start = time.time()
     count = 0
-    #CHECKS=[]
     for i in range(TRIALS):
         header.nTime = i
         header.nNonce = 0
         headhex = header.serialize().hex()
         cmd = args.grind_cmd.split(" ") + [headhex]
         newheadhex = subprocess.run(cmd, stdout=subprocess.PIPE, input=b"", check=True).stdout.strip()
-        #newhead = FromHex(CBlockHeader(), newheadhex.decode('utf8'))
-        #count += newhead.nNonce
-        #if (i+1) % 100 == 0:
-        #   CHECKS.append((i+1, count, time.time()-start))
-
-    #print("checks =", [c*1.0 / (b*targ*2**-256) for _,b,c in CHECKS])
 
     avg = (time.time() - start) * 1.0 / TRIALS
-    #exp_count = 2**256 / targ * TRIALS
-    #print("avg =", avg, "count =", count, "exp_count =", exp_count)
 
     if args.nbits is not None:
         want_targ = nbits_to_target(int(args.nbits,16))
@@ -593,7 +583,6 @@ def main():
     generate.add_argument("--nbits", default=None, type=str, help="Target nBits (specify difficulty)")
     generate.add_argument("--min-nbits", action="store_true", help="Target minimum nBits (use min difficulty)")
     generate.add_argument("--poisson", action="store_true", help="Simulate randomised block times")
-    #generate.add_argument("--signcmd", default=None, type=str, help="Alternative signing command")
     generate.add_argument("--multiminer", default=None, type=str, help="Specify which set of blocks to mine (eg: 1-40/100 for the first 40%%, 2/3 for the second 3rd)")
     generate.add_argument("--backup-delay", default=300, type=int, help="Seconds to delay before mining blocks reserved for other miners (default=300)")
     generate.add_argument("--standby-delay", default=0, type=int, help="Seconds to delay before mining blocks (default=0)")