E-mail from Dyson to let me know the day to wash filter

It was a surprise to me that an electric vacuum cleaner manufacturer send an e-mail saying that it’s the time to wash your filter. Frankly, it’s not so difficult to send a automatic mass e-mail for eMarketer. But, I never expected to receive an service alarm mail from home electric manufacturer like Dyson. Even car… Continue reading E-mail from Dyson to let me know the day to wash filter