diff --git a/src/mol-gl/webgl/program.ts b/src/mol-gl/webgl/program.ts
index 08cdecd3576516da8adea9c065a50e8165d2fe67..d64d1ca58868a7552bf222f8cd93e9158ff3a3c0 100644
--- a/src/mol-gl/webgl/program.ts
+++ b/src/mol-gl/webgl/program.ts
@@ -36,9 +36,9 @@ function getAttributeLocations(ctx: Context, program: WebGLProgram, schema: Rend
         const spec = schema[k]
         if (spec.type === 'attribute') {
             const loc = gl.getAttribLocation(program, k)
-            if (loc === -1) {
-                console.info(`Could not get attribute location for '${k}'`)
-            }
+            // if (loc === -1) {
+            //     console.info(`Could not get attribute location for '${k}'`)
+            // }
             locations[k] = loc
         }
     })
diff --git a/src/mol-gl/webgl/render-item.ts b/src/mol-gl/webgl/render-item.ts
index 2bdf68ad417ed2b2ccfb76708c9e704451d66875..8202e4d33c082f97ba914364615078f04eb3d810 100644
--- a/src/mol-gl/webgl/render-item.ts
+++ b/src/mol-gl/webgl/render-item.ts
@@ -116,14 +116,14 @@ export function createRenderItem(ctx: Context, drawMode: DrawMode, shaderCode: S
             Object.keys(defineValues).forEach(k => {
                 const value = defineValues[k]
                 if (value.ref.version !== versions[k]) {
-                    console.log('define version changed', k)
+                    // console.log('define version changed', k)
                     defineChange = true
                     versions[k] = value.ref.version
                 }
             })
 
             if (defineChange) {
-                console.log('some defines changed, need to rebuild programs')
+                // console.log('some defines changed, need to rebuild programs')
                 Object.keys(RenderVariantDefines).forEach(k => {
                     const variantDefineValues: Values<RenderableSchema> = (RenderVariantDefines as any)[k]
                     programs[k].free()
@@ -135,12 +135,12 @@ export function createRenderItem(ctx: Context, drawMode: DrawMode, shaderCode: S
             }
 
             if (values.drawCount.ref.version !== versions.drawCount) {
-                console.log('drawCount version changed')
+                // console.log('drawCount version changed')
                 drawCount = values.drawCount.ref.value
                 versions.drawCount = values.drawCount.ref.version
             }
             if (values.instanceCount.ref.version !== versions.instanceCount) {
-                console.log('instanceCount version changed')
+                // console.log('instanceCount version changed')
                 instanceCount = values.instanceCount.ref.value
                 versions.instanceCount = values.instanceCount.ref.version
             }
@@ -152,10 +152,10 @@ export function createRenderItem(ctx: Context, drawMode: DrawMode, shaderCode: S
                 if (value.ref.version !== versions[k]) {
                     const buffer = attributeBuffers[k]
                     if (buffer.length >= value.ref.value.length) {
-                        console.log('attribute array large enough to update', k)
+                        // console.log('attribute array large enough to update', k)
                         attributeBuffers[k].updateData(value.ref.value)
                     } else {
-                        console.log('attribute array to small, need to create new attribute', k)
+                        // console.log('attribute array to small, need to create new attribute', k)
                         attributeBuffers[k].destroy()
                         const spec = schema[k] as AttributeSpec<ArrayKind>
                         attributeBuffers[k] = createAttributeBuffer(ctx, value.ref.value, spec.itemSize, spec.divisor)
@@ -167,10 +167,10 @@ export function createRenderItem(ctx: Context, drawMode: DrawMode, shaderCode: S
 
             if (elementsBuffer && values.elements.ref.version !== versions.elements) {
                 if (elementsBuffer.length >= values.elements.ref.value.length) {
-                    console.log('elements array large enough to update')
+                    // console.log('elements array large enough to update')
                     elementsBuffer.updateData(values.elements.ref.value)
                 } else {
-                    console.log('elements array to small, need to create new elements')
+                    // console.log('elements array to small, need to create new elements')
                     elementsBuffer.destroy()
                     elementsBuffer = createElementsBuffer(ctx, values.elements.ref.value)
                     bufferChange = true
@@ -179,8 +179,9 @@ export function createRenderItem(ctx: Context, drawMode: DrawMode, shaderCode: S
             }
 
             if (defineChange || bufferChange) {
-                console.log('program/defines or buffers changed, rebuild vaos')
+                // console.log('program/defines or buffers changed, rebuild vaos')
                 Object.keys(RenderVariantDefines).forEach(k => {
+                    deleteVertexArray(ctx, vertexArrays[k])
                     vertexArrays[k] = createVertexArray(ctx, programs[k].value, attributeBuffers, elementsBuffer)
                 })
             }
@@ -188,7 +189,7 @@ export function createRenderItem(ctx: Context, drawMode: DrawMode, shaderCode: S
             Object.keys(textureValues).forEach(k => {
                 const value = textureValues[k]
                 if (value.ref.version !== versions[k]) {
-                    console.log('texture version changed, uploading image', k)
+                    // console.log('texture version changed, uploading image', k)
                     textures[k].load(value.ref.value)
                     versions[k] = value.ref.version
                 }
diff --git a/src/mol-gl/webgl/uniform.ts b/src/mol-gl/webgl/uniform.ts
index 6000fe319cf9a97e7502145cc77c1b9e73d97513..b3dfeb4c90e90efe04e59ff6574c52fbc68c5a3b 100644
--- a/src/mol-gl/webgl/uniform.ts
+++ b/src/mol-gl/webgl/uniform.ts
@@ -34,7 +34,7 @@ function createUniformSetter(ctx: Context, program: WebGLProgram, name: string,
     const { gl } = ctx
     const location = gl.getUniformLocation(program, name)
     if (location === null) {
-        console.info(`Could not get WebGL uniform location for '${name}'`)
+        // console.info(`Could not get WebGL uniform location for '${name}'`)
     }
     switch (kind) {
         case 'f': return (value: number) => gl.uniform1f(location, value)