diff -r ab6423be2a1e -r 9d1af81b20ef www/js/prod_edit.js
--- a/www/js/prod_edit.js	Wed Mar 18 14:36:11 2020 +0100
+++ b/www/js/prod_edit.js	Wed Mar 18 19:46:15 2020 +0100
@@ -64,6 +64,8 @@
  ok_yeasts = 1,       // Yeasts are in stock
  ok_waters = 1,       // Waters are in stock
 
+ error_count = 0;
+
  hop_flavour = 0,
  hop_aroma = 0,
  mash_infuse = 0,
@@ -2403,6 +2405,7 @@
 
   if (maybe_starter != dataRecord.starter_enable) {
    dataRecord.starter_enable = maybe_starter;
+   showStarter();
   }
 
   if (dataRecord.starter_enable) {
@@ -2770,12 +2773,15 @@
     }
    }
   } else {
-   console.log('ProtonDeficit(' + pHZ + ') invalid grist, return ' + Result);
+   error_count++;
+   if (error_count < 5)
+    console.log('ProtonDeficit(' + pHZ + ') invalid grist, return ' + Result);
   }
   return Result;
  }
 
  function MashpH() {
+  console.log('MashpH()');
   var n = 0, pH = 5.4, deltapH = 0.001, deltapd = 0.1, pd = ProtonDeficit(pH);
   while (((pd < -deltapd) || (pd > deltapd)) && (n < 2000)) {
    n++;
@@ -3103,6 +3109,7 @@
 
     deltapH = 0.001;
     deltapd = 0.1;
+    console.log('in calcWater() manual');
     pd = ProtonDeficit(pHa);
     n = 0;
     while (((pd < (protonDeficit - deltapd)) || (pd > (protonDeficit + deltapd))) && (n < 2000)) {
@@ -3689,10 +3696,14 @@
   calcEfficiencyAfterBoil();
 
   $('#starter_try').click(function() {
-   $('#prop1_volume,#prop2_volume,#prop3_volume,#prop4_volume').val(0);
+   $('#prop1_volume').val(0);
+   $('#prop2_volume').val(0);
+   $('#prop3_volume').val(0);
+   $('#prop4_volume').val(0);
+   dataRecord.prop1_volume = dataRecord.prop2_volume = dataRecord.prop3_volume = dataRecord.prop4_volume = 0;
    calcYeast();
   });
-  $('#starter_type').on('change', function(event) {
+  $('#starter_type').on('select', function(event) {
    if (event.args) {
     dataRecord.starter_type = event.args.index;
     calcYeast();
@@ -3704,7 +3715,7 @@
     calcYeast();
    }
   });
-  $('#prop1_type').on('change', function(event) {
+  $('#prop1_type').on('select', function(event) {
    if (event.args) {
     dataRecord.prop1_type = event.args.index;
     calcYeast();
@@ -3716,7 +3727,7 @@
     calcYeast();
    }
   });
-  $('#prop2_type').on('change', function(event) {
+  $('#prop2_type').on('select', function(event) {
    if (event.args) {
     dataRecord.prop2_type = event.args.index;
     calcYeast();
@@ -3728,7 +3739,7 @@
     calcYeast();
    }
   });
-  $('#prop3_type').on('change', function(event) {
+  $('#prop3_type').on('select', function(event) {
    if (event.args) {
     dataRecord.prop3_type = event.args.index;
     calcYeast();
@@ -3740,7 +3751,7 @@
     calcYeast();
    }
   });
-  $('#prop4_type').on('change', function(event) {
+  $('#prop4_type').on('select', function(event) {
    if (event.args) {
     dataRecord.prop4_type = event.args.index;
     calcYeast();
@@ -3813,7 +3824,7 @@
     calcWater();
    }
   });
-  $('#wa_base_name').on('change', function(event) {
+  $('#wa_base_name').on('select', function(event) {
    if (event.args) {
     var index = event.args.index;
     console.log('wa_base_name ' + index);
@@ -3829,7 +3840,7 @@
    setWaterAgent(name, parseFloat(event.args.value));
    calcWater();
   });
-  $('#wa_acid_name').on('change', function(event) {
+  $('#wa_acid_name').on('select', function(event) {
    if (event.args) {
     var index = event.args.index;
     console.log('wa_acid_name ' + index);
@@ -3847,11 +3858,11 @@
   });
   $('#wa_acid_perc').on('change', function(event) { calcWater(); });
 
-  $('#color_method').on('change', function(event) {
+  $('#color_method').on('select', function(event) {
    dataRecord.color_method = event.args.index;
    calcFermentables();
   });
-  $('#ibu_method').on('change', function(event) {
+  $('#ibu_method').on('select', function(event) {
    dataRecord.ibu_method = event.args.index;
    calcFermentables();
    calcIBUs();
@@ -3930,13 +3941,13 @@
    dataRecord.sparge_temp = parseFloat(event.args.value);
    $('#brew_sparge_temperature').val(dataRecord.sparge_temp);
   });
-  $('#sparge_source').on('change', function(event) {
+  $('#sparge_source').on('select', function(event) {
    if (event.args) {
     dataRecord.sparge_source = event.args.index;
     calcSparge();
    }
   });
-  $('#sparge_acid_type').on('change', function(event) {
+  $('#sparge_acid_type').on('select', function(event) {
    if (event.args) {
     dataRecord.sparge_acid_type = event.args.index;
     console.log('new sparge_acid_type: ' + dataRecord.sparge_acid_type);