@Lilice I think it's recommended to test with first morning urine. When I finally did that because the MW gave me a pot to use for the following appt at 28w I then got a clear result there! And it was clear every time I did at home ones with first morning.
I think try to do first morning urine, and then be as consistent as possible at the same time of day each time u check it with the home strips, that'll give u most accurate results.
Each time I got a glucose positive at the MW, it was after breakfast. One of those included marmalade on my toast, orange juice and Frosties cornflakes!! Then the next time I tried to be good and had toast with no marmalade, shreddies cereal and water but still got a positive on the glucose! I just think my body rubbish at getting rid of sugar in the mornings!!
I wouldn't worry to much about it, try the strips at home and take it from there xx