Just been to Costco and picked up some for only 2(20) packs for £1.14p normal RRP is around £4 for one pack(10 tablets)
"20 Simoniz Car Shampoo Tabs Tablets No Measure No Mess!
Just Chuck it in a Bucket!!!!
No Measure No Mess - Just a Streak Free Shine Every Time
1 Tablet per wash 20 tablets 20 washes"