You can 'regenerate' the dryer material quite simply
If you are able comandeer the kitchen oven for few hours

... empty the dryer material onto a flat tray and spread it out evenly. Set the oven to 110 deg C, bring it to temp and then place the tray of desiccant in the oven for 3 hrs. Let the oven cool and put the dryer material into a coarse sieve and get rid of the powder (causes problems in the valve block). Put the (now) cool desiccant material back into the dryer...!
A little kitchen chemistry can be fun and rewarding!

cheers
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