Hello,
Thanks for posting your query at DoctorSpring.com
I have gone through your question in detail and I can understand what you are going through.
Valium and its metabolites are detecable in urine upto 23 days of its usage and your calculation gets you to 21 days. Its mostly +/- 5 days depending on a persons metablic capacity. So there is only a chance that you may come psotive say 50/50.
Regarding the option 'Cleaner 7 day Men's forumla' , these are rampantly available on internet and many of my patients have used it. They have very good reviews on internet but many of my patients ould not get the said benefit with reports coming postive even after 10 days of taking valium. As you are past the 20 days mark, you can take it but then it doesnt give a 100% assurance.
Also let me make you aware that it may cause some serious cramps in abdomen while it is acting. So be ready for them and go ahead with suing it.
Hope this helps,
IN case if you have any further query, do let me know.

Kind regards