As one of its daily deals, Amazon cuts up to 35% off a selection of iSonic ultrasonic cleaners, as listed below. Plus, Prime members bag free shipping on all orders. (Non-members can spend $49 or more to qualify for free shipping; otherwise, shipping costs $6.53.) The deals, ending today:

• iSonic F3900 Ultrasonic Cleaner for $27.83 (pictured, low by $17)
• iSonic P4810 2.1-Qt. Commercial Ultrasonic Cleaner for $61.90 (low by $48)
• iSonic P4820-WSB 2.6-Qt. Commercial Ultrasonic Cleaner for $63.65 ($30 off)
• iSonic P4830 3.2-Qt. Commercial Ultrasonic Cleaner for $100 (low by $120)