Ultrasonic Cleaners

What causes an (industrial) ultrasonic cleaner to become ineffective through time ?.
Is it the transducers that degrade ?.
TIA
woodglass...
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

Polytechforum.com is a website by engineers for engineers. It is not affiliated with any of manufacturers or vendors discussed here. All logos and trade names are the property of their respective owners.