Similar to Phil
I clean as I go, using a tool I made from an old set of kitchen knifes that my wife decided were past their best. This removes the addy from the joints.
However, I have never used a Commerical Joint Spacer in my life. I use window fitters packers - 1/2/3/4/5/6 mm colour coded. Use them as packers and hence remove as the addy goes off. They are re-useable and about 20mm wide x 100mm long and plently to grab hold of. Twist sideways and the 'right angle' on the end will act as a lever pivot. Yesterday I had to leave the job with about 20 packers still in the joints on wall, I will have to use my home made tool or if stuck in real good a pair of snipe nose pillers to lift these from the joints next Tuesday with a piece of timber under the pivot of the pillers to spread the load whilst pulling the little buggers.