diff --git a/oscar/SleepLib/loader_plugins/prs1_loader.cpp b/oscar/SleepLib/loader_plugins/prs1_loader.cpp
index a5865127..f4ef9683 100644
--- a/oscar/SleepLib/loader_plugins/prs1_loader.cpp
+++ b/oscar/SleepLib/loader_plugins/prs1_loader.cpp
@@ -4196,35 +4196,19 @@ bool PRS1DataChunk::ParseSettingsF0V4(const unsigned char* data, int /*size*/)
     quint8 flex = data[0x0a];
     this->ParseFlexSetting(flex, cpapmode);
 
-    //qWarning() << this->sessionid << hex(data[0x0b]) << hex(data[0x0c]);
-    // 333  90 05 = system one humid, humidifier off, (22mm hose)
-    // 307  B3 0A = system one humid, tube temp 5, humidity 3, humidity 3 on tube disconnect (15mm hose)
-    //  57  B3 0A = system one humid, tube temp 5, humidity 3, humidity 3 on tube disconnect
-    // 405  33 0A = system one humid, tube temp 4, humidity 3, humidity 3 on tube disconnect
-    // 406  B3 09 = system one humid, tube temp 3, humidity 3, humidity 3 on tube disconnect
-    //  83  33 09 = system one humid, tube temp 2, humidity 3, humidity 3 on tube disconnect
-    // 339  B5 08 = system one humid, tube temp 1, humidity 3, humidity 3 on tube disconnect [even though humidlevel is 5; maybe always 3 on disconnect?]
-    // 200  A4 09 = system one humid, tube temp 3, humidity 2, humidity 3 on tube disconnect [even though humidlevel is 4]
-    //  10  22 09 = system one humid, tube temp 2, humidity 2, humidity 3 on tube disconnect [even though humidlevel is 2]
-    //   9  21 09 = system one humid, tube temp 2, humidity 2, humidity 3 on tube disconnect [even though humidlevel is 1]
-    //  27  A3 0A = system one humid, tube temp 5, humidity 2, humidity 3 on tube disconnect
-    //   6  03 08 = system one humid, tube temp 0=off, humidity 3 on tube disconnect
-    //   7  95 06 = system one humid, no tube [22mm hose], humidity 5 [on tube disconnect?]
-    // 150  A3 61 = classic humid [no tube/22mm hose], humidity 3
-    //   2  93 11 = system one humid, no tube [22mm hose], humidity 3 [on tube disconnect?]
-    //   3  95 41 = classic humid [no tube/22mm hose], humidity 5
 
-    //       7    = humidity level without tube [on tube disconnect / system one with 22mm hose / classic] [0 = humidifier off?]
-    //       8    = ???
-    //      3     = humidity level with tube
-    //      4     = maybe part of humidity level? [never seen]
-    //      8   3 = tube temperature (high bit of humid 1 is low bit of temp)
-    //          4 = ??? [90 05?, 95 06?] humidifier off? [TODO: search for other examples of this]
-    //          8 = tube present
-    //         10 = ??? [93 11?] [TODO: search for other examples of this]
-    //         20 = ??? [41 vs 61? no visible difference in report, but it's in classic mode; TODO: search for other examples of this bit]
-    //         40 = classic
-    //         80 = ??? [never seen]
+    // XX XX = F0V4 Humidifier bytes
+    //  7    = humidity level without tube [on tube disconnect / system one with 22mm hose / classic] [0 = humidifier off?]
+    //  8    = [never seen]
+    // 3     = humidity level with tube
+    // 4     = maybe part of humidity level? [never seen]
+    // 8   3 = tube temperature (high bit of humid 1 is low bit of temp)
+    //     4 = "System One" mode
+    //     8 = tube present
+    //    10 = no data in chart, maybe no humidifier attached?
+    //    20 = unknown, something tube related since whenever it's set tubepresent is false
+    //    40 = "Classic" mode
+    //    80 = [never seen]
     
     int humid1 = data[0x0b];
     int humid2 = data[0x0c];
@@ -4250,7 +4234,7 @@ bool PRS1DataChunk::ParseSettingsF0V4(const unsigned char* data, int /*size*/)
     if (humidsystemone + tubepresent + no_data > 1) UNEXPECTED_VALUE(humid2, "one bit set");  // Only one of these ever seems to be set at a time
     if (tubepresent && tubetemp == 0) CHECK_VALUE(tubehumidlevel, 0);  // When the heated tube is off, tube humidity seems to be 0
     
-    qWarning() << this->sessionid << (humidclassic ? "C" : ".") << (humid2 & 0x20 ? "?" : ".") << (tubepresent ? "T" : ".") << (no_data ? "X" : ".") << (humidsystemone ? "1" : ".");
+    //qWarning() << this->sessionid << (humidclassic ? "C" : ".") << (humid2 & 0x20 ? "?" : ".") << (tubepresent ? "T" : ".") << (no_data ? "X" : ".") << (humidsystemone ? "1" : ".");
     /*
     if (tubepresent) {
         if (tubetemp) {
@@ -4266,22 +4250,9 @@ bool PRS1DataChunk::ParseSettingsF0V4(const unsigned char* data, int /*size*/)
     this->AddEvent(new PRS1ParsedSettingEvent(PRS1_SETTING_HEATED_TUBING, tubepresent));
     this->AddEvent(new PRS1ParsedSettingEvent(PRS1_SETTING_HUMID_LEVEL, tubepresent ? tubehumidlevel : humidlevel));  // TODO: we also need tubetemp
 
-    /*
-    this->AddEvent(new PRS1ParsedSettingEvent(PRS1_SETTING_HUMID_STATUS, (humid & 0x80) != 0));        // Humidifier Connected
-    if (supportsHeatedTubing) {
-        this->AddEvent(new PRS1ParsedSettingEvent(PRS1_SETTING_HEATED_TUBING, (humid & 0x10) != 0));        // Heated Hose??
-        // TODO: 0x20 is seen on machines with System One humidification & heated tubing, not sure which setting it represents.
-    } else {
-        CHECK_VALUE(humid & 0x30, 0);
-    }
-    int humidlevel = humid & 7;
-    this->AddEvent(new PRS1ParsedSettingEvent(PRS1_SETTING_HUMID_LEVEL, humidlevel));          // Humidifier Value
-
-    if (humidlevel > 5) UNEXPECTED_VALUE(humidlevel, "<= 5");
-    */
 
     int resist_level = (data[0x0d] >> 3) & 7;  // 0x18 resist=3, 0x11 resist=2
-    CHECK_VALUE(data[0x0d] & 0x20, 0);  // TODO: flag sessions so we can confirm whether the above mask is correct
+    CHECK_VALUE(data[0x0d] & 0x20, 0);  // never seen, but would clarify whether above mask is correct
     this->AddEvent(new PRS1ParsedSettingEvent(PRS1_SETTING_MASK_RESIST_LOCK, (data[0x0d] & 0x40) != 0));
     this->AddEvent(new PRS1ParsedSettingEvent(PRS1_SETTING_MASK_RESIST_SETTING, resist_level));
     this->AddEvent(new PRS1ParsedSettingEvent(PRS1_SETTING_HOSE_DIAMETER, (data[0x0d] & 0x01) ? 15 : 22));