"The hard part are the things outside my control, like getting the test strips and the medicines."

These are much better than "test strips" and pretty simple to use.

Use your test strip as a guide to how much flash to give.

Get a test strip from your bottle of testing strips.

I reached in and pulled out our positive test strip.

Start timing immediately after blood first makes contact with the test strip.

He had chosen a thirty second exposure for this test strip.

The test strip has to be sent to a lab for confirmation and to find out which drug was used.

The test strip said that the outside of the bag was clean.

This extra footage will be developed and used as test strips.