[header] How to make roses last longer [title] Start with a clean vase. [step] Before putting your roses on display, run your vase through the dishwasher or wash it thoroughly by hand with warm water and antibacterial soap. Using a clean container is important, as dirty vases often harbor germs and mineral and chemical deposits from tap water. 
[substeps] If you use the same vase regularly, get in the habit of scrubbing it out between uses. Make sure the inside of the container is spotless.